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There’s a Giant Flaw in Human History

stevevw

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That does not match the descriptions or recreations of the methods involved. From this definition, I can not refer to them as "freehand".
Why. You have not yourself explained what you mean. But do I need to spell it out. Is there a difference between a machines vase and one made without being machined on a lathe. Are there differences that outside guidence to the hand or directly to the work bypassing the hand that can ensure precision. Whatever you want tyo call it or frame it its this difference I am talking about.
And those guides have been demonstrated.
This is a broad and unqualified claim. What exactly has been demonstrated. Has the method on the wall been demonstrated to produce such precision we see in the predynastic vases. No. The tests showed this and they were 10 times less precise. The experimenters had to add modern aids to even get to 10 times less precise. What does that tell you.
What part of the vase being turned against a fixed grinding stone have you not seen.
Ah many parts. The inside is not even done let alone be up to CNC level. Wall thickness all over the place. Its 10 times less precise. Thats because it was done by the bow string or bent stick rotating device which wobbles and is all over the place. Theres no bearings or stability.

We have ample examples of the inferior primitive method and their signatures look exactly what we would expect imprecise even though most are done in softer stones and still nowhere near that CNC machine level.
1/40" (0.025 inch) is not that small. My 25 foot tape measure has marks to 1/16". I have aluminum straight edge rulers that have 1/32" marks. I'm willing to claim that I have sanded fill in drywall repair to better than 0.025 of an inch *BY HAND*.
Well the tests showed that the handmade vases were nowhere near such precision. The 0.025 was the limit. But several vases came well under that at 0.002 to 0.005 inch. A couple being even more precise than modern CNC vases.
The experiment wasn't about "precision". Do I need to repeat that?

OK...

The experiment wasn't about "precision".
The experiment wasn't about "precision".
The experiment wasn't about "precision".
Then stop using them to claim that the precision can be made by said method. Thats what your doing every time you cite them as examples that they can be made by such a method.
No turntable in the video I have posted a couple times.
Hum well the article shows the pics with it on the turning wheel. Are you talking about Olgas vase. Why would the article lie that Olga used a turning wheel.

But wait, are you not saying that the symmetry and circularity of these vases could easily be achieved by a turning table or lathe. Is not that the explaination for such signatures. Thats what everyone is saying. That this precision could be achieved by some rudimentary turning device.

1758694903986.png

I really don't know what you are talking about, and...

The experiment wasn't about "precision".
The experiment wasn't about "precision".
The experiment wasn't about "precision".
Then stop using them to refute the precision found in the predyanastic vases. Using them as an example of how the same signatures and precision can be achieved.
Everytime anyone suggets anything like a lathe or a turntable you claim such technology didn't exist and then turn right around an want a computer controlled machine running on pyramid power. Get serious.
No thats your conflation. You are injecting this because you want it to be that way. You want to turn it into aliens conspiracies. I have simply said if what I am saying is so far fetched then why does just about everyone including on this thread agree that to achieve such precision in symmetry and circularity that its obvious a lathe of some sort would be the way this was achieved.

Thats all. I am then saying if this is the case then why not the same for other witness marks that look modern.

I clearly said I am not stating any specific tech and I specifically said this does not mean they had some modern looking computerised machine. Thats you making. I said I don't know.
Et tu Stephanus.
Whatever lol.
 
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stevevw

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It's called "skill."
Skill to do what. How can a craftsman skill create precision symmetry and circularity that only a lathe can do. Is the craftman a lathe. A human cannot be a lath. They need a lathe to create precise symmetry and circularity. The same with other witness marks that show modern CNC marks. If artists could create precision parts we would not need CNC machining and lathes.
The lines are precisely what the artist or the craftsman wants, regardless of geometry. Now you denigrate artists as well as skilled craftsmen.
Yes art is an expression and not tech. An artists may draw or create a house model. But it is the engineering that makes the right measures for the house for the builders to follow.

I am not criticing art. Art is different to the technical knowhow such as engineering or precision which requires guidence beyond the human who is not a machine.
It's called "measurement" a subject well understood by the Egyptians.
Yes so now we come to the introduction of aids. They can make measurements, templates and stencils to ensure the shapes conform to pre determines lines like a perfect circle or angle and ratio. The Golden ration was often used. So you need to measure that into the vase to ensure that ration and not another ration. That takes measures, guides to achieve.

Now extend this to CNC machining. Same thing just mopre elaborate and what we naturally attribute high precision to. The same idea of using simple aids but more sophsiticated. Why is it such a problem to say that complex precision needs more sophisticated methods.
That is is 100% pure weapons grade bolognium. Such a poorly informed assertion deserves no further response.
Once again I refer back to the link.

Discussion​

It is nothing short of astonishing to find that the most ‘precise’ vases in Matt Beall’s collection (e.g. V18 and V4) are characterized by the circularity error <RMSE> = 0.6 thousands of an inch (15 microns) and the centering error <dR> = 0.1 thousandths of an inch (2.5 microns). The centering error of the vase V18 is actually below the resolving ability of the analysis methodology used (0.2 thousandths of an inch).

The vases V4 and V18 appear to be 10 times more precise (in terms of the quality metric M) compared to the modern vases.

it appears
utterly inconceivable that such remarkable precision can be achieved using primitive ‘stone and stick’ technology, as the manually made ‘replica’ vases O1 and O2 clearly show.


This manufacturing quality is indicative of a much less advanced manufacturing technique consistent with the ‘stone and stick’ technology. In other words, there is a huge gap in quality between the two classes of artifacts, which spans more than an order of magnitude in precision.

Why is it so important for you to prove that?
No particular reason. Just the truth. Like I said I like the topic and so I create threads about it. Then skeptics jump in. If anything it seems the skeptics are more desperate to show everyone how this is all whackery.To enlighten the poor ones who they think are deluded lol.

I am not going around and getting upset and calling people who disagree names or making out they are studip or whackos for suggesting such ideas. Just pointing out some out of place works that contradict the orthodoxy.
 
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Tuur

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Except an axe is completely different. Leaving square cut marks in a beam due to the swing of an axe does not take any effort to leave those marks. Apart from ensuring you hit the beam in the right general area. But comparing this to these scoop marks would be like an axeman purposely calving out squares in the wood as part of chopping the beam.
I've just deleted a rather lengthy post on log hewing. Suffice to say it's not common knowledge these days and it leaves marks. If you don't know how it's done, those marks are a mystery. Without any insult, if someone's never worked at making stuff by hand, they may be unaware that different steps in the process leave different marks. They would also be unaware of what's involved in smoothing them, or marks left during other aspects of construction. Quite simply, if it's unfinished or not necessary to remove the marks, those marks are going to be there.

That's what we're dealing with here. That scoop shape? That's a consequence of rubbing it back and forth. You can see the same thing where you don't want stuff worn down.

Just a suggestion, and it's one without any insult: Try making stuff. That's all. Just make stuff. See what can be done without the latest and greatest, because the latest and greatest means spending money. Simply making stuff can be an eye-opener.
 
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sjastro

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Discussion​

It is nothing short of astonishing to find that the most ‘precise’ vases in Matt Beall’s collection (e.g. V18 and V4) are characterized by the circularity error <RMSE> = 0.6 thousands of an inch (15 microns) and the centering error <dR> = 0.1 thousandths of an inch (2.5 microns). The centering error of the vase V18 is actually below the resolving ability of the analysis methodology used (0.2 thousandths of an inch).

The vases V4 and V18 appear to be 10 times more precise (in terms of the quality metric M) compared to the modern vases.

it appears
utterly inconceivable that such remarkable precision can be achieved using primitive ‘stone and stick’ technology, as the manually made ‘replica’ vases O1 and O2 clearly show.


This manufacturing quality is indicative of a much less advanced manufacturing technique consistent with the ‘stone and stick’ technology. In other words, there is a huge gap in quality between the two classes of artifacts, which spans more than an order of magnitude in precision.
Unfortunately you are totally oblivious of the flaws in the relevant link.


What struck me was the only results you quoted from the link were the circularity and centering errors.
On reading your link things started to make sense including a glaring flaw which invalidates all his results.
Like the mob at unsigned.io he decided to write up his own code using MatLab (why don't these guys make things easier for themselves and use professional software).
Here he limited himself to 2D cuts through the scanned data using a circle fitting code as illustrated.

one.png

Since the vase has an inner and outer diameter there is a separate RMSE and dR for each defined by the quality metric M.

two.png


At this stage I have no issues but then he makes a terrible error by assuming perfect axiality for the model circles where each circular slice made through the vase shares the same common central axis as illustrated.

four.png


He has assumed perfect cylindricity (= 0) but as we know from the unchartedX scanned data, for a purported predynastic granite vase, the cylindricity value is large (= 326 μm) at the vase mouth.
If cylindricity is less than perfect each slice made does not share a common centre (x,y) for the model circle which makes the value dR inaccurate as (x,y) changes for each slice made along the z-axis.

Therefore the value of the quality metric defined in the graph is a useless parameter for differentiating a precise from an imprecise vase.

three.png

If he had used professional software the cylindricity value would have been calculated not assumed to be zero as would the circularity which also depends on cylindricity.
There is no doubt the results would be very different.
 
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BCP1928

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Skill to do what. How can a craftsman skill create precision symmetry and circularity that only a lathe can do. Is the craftman a lathe. A human cannot be a lath. They need a lathe to create precise symmetry and circularity.
No, it can be done by hand if you have the time and patience. Go back and read my post #431 and respond to it.
The same with other witness marks that show modern CNC marks. If artists could create precision parts we would not need CNC machining and lathes.

Yes art is an expression and not tech. An artists may draw or create a house model. But it is the engineering that makes the right measures for the house for the builders to follow.
And...?
I am not criticing art. Art is different to the technical knowhow such as engineering or precision which requires guidence beyond the human who is not a machine.

Yes so now we come to the introduction of aids. They can make measurements, templates and stencils to ensure the shapes conform to pre determines lines like a perfect circle or angle and ratio. The Golden ration was often used. So you need to measure that into the vase to ensure that ration and not another ration. That takes measures, guides to achieve.
,Yes, that's what it takes. But it is not clear to me why you deny the use of these "aids" to Egyptian craftsmen. They are known to have been experts, and understood the same basic principles of metrology that we rely on today, whether we're using a CNC machine or not.
Now extend this to CNC machining. Same thing just mopre elaborate and what we naturally attribute high precision to. The same idea of using simple aids but more sophsiticated. Why is it such a problem to say that complex precision needs more sophisticated methods.
I don't know what you mean by "complex precision." In general, a craftsman using hand tools uses the same measuring tools and techniques as the operator of a CNC machine.
Once again I refer back to the link.

Discussion​

It is nothing short of astonishing to find that the most ‘precise’ vases in Matt Beall’s collection (e.g. V18 and V4) are characterized by the circularity error <RMSE> = 0.6 thousands of an inch (15 microns) and the centering error <dR> = 0.1 thousandths of an inch (2.5 microns). The centering error of the vase V18 is actually below the resolving ability of the analysis methodology used (0.2 thousandths of an inch).

The vases V4 and V18 appear to be 10 times more precise (in terms of the quality metric M) compared to the modern vases.

it appears
utterly inconceivable that such remarkable precision can be achieved using primitive ‘stone and stick’ technology, as the manually made ‘replica’ vases O1 and O2 clearly show.


This manufacturing quality is indicative of a much less advanced manufacturing technique consistent with the ‘stone and stick’ technology. In other words, there is a huge gap in quality between the two classes of artifacts, which spans more than an order of magnitude in precision.
You claimed that anything beyond 25 thousandths tolerance (0.025") required a CNC machine. Are you sure you want to stick with that?
No particular reason. Just the truth. Like I said I like the topic and so I create threads about it. Then skeptics jump in. If anything it seems the skeptics are more desperate to show everyone how this is all whackery.To enlighten the poor ones who they think are deluded lol.

I am not going around and getting upset and calling people who disagree names or making out they are studip or whackos for suggesting such ideas. Just pointing out some out of place works that contradict the orthodoxy.
That's because it is all whackery, and every time we point it out you double down. The trouble is, you don't know very much--if anything--about how skilled craftesmen carry out their work, either then or now, and won't listen to people who do because you've been captivated by the whackery. It is captivating for the layman; Erik von Daniken alone sold over 70 million books.
 
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Tuur

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That's what we're dealing with here. That scoop shape? That's a consequence of rubbing it back and forth. You can see the same thing where you don't want stuff worn down.
Addendum
Just realized I have an example somewhere around here: Synthetic and an Arkansas soft stone whet rocks. Over the years both got swaybacked, just from sharpening knife and tool blades.
 
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Hans Blaster

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Why. You have not yourself explained what you mean.
"freehand" is the term *you* keep using. You speak of it as unguided, so using anykind of guiding mechanism, from a frame to a lathe, is not 'freehand'. Let me ask a clarifying question.

If a potter uses a wheel and their hands, is that "freehand".

But do I need to spell it out.
Frankly, yes.
Is there a difference between a machines vase and one made without being machined on a lathe.
The devices I have seen in the experiments, and archeological record *ARE MACHINES*.
Are there differences that outside guidence to the hand or directly to the work bypassing the hand that can ensure precision. Whatever you want tyo call it or frame it its this difference I am talking about.
The frame or other guiding device is to keep the axis of rotation aligned.
This is a broad and unqualified claim. What exactly has been demonstrated. Has the method on the wall been demonstrated to produce such precision we see in the predynastic vases. No. The tests showed this and they were 10 times less precise. The experimenters had to add modern aids to even get to 10 times less precise. What does that tell you.
Guiding mechanism for rotated working of stone is clearly demonstrated. You push it aside because of the precision of one small group of experiments that are *NOT* aiming to replicate that "precision". The objection is not justified.
Ah many parts. The inside is not even done let alone be up to CNC level. Wall thickness all over the place. Its 10 times less precise. Thats because it was done by the bow string or bent stick rotating device which wobbles and is all over the place. Theres no bearings or stability.

We have ample examples of the inferior primitive method and their signatures look exactly what we would expect imprecise even though most are done in softer stones and still nowhere near that CNC machine level.
Not even related to my question.
Well the tests showed that the handmade vases were nowhere near such precision. The 0.025 was the limit. But several vases came well under that at 0.002 to 0.005 inch. A couple being even more precise than modern CNC vases.

Then stop using them to claim that the precision can be made by said method. Thats what your doing every time you cite them as examples that they can be made by such a method.
You keep getting the argument and proof claims backward. you have repeatedly claimed that the experimentally demonstrated can't be by such methods when that is simply not true. The experimenters were not trying to make a "precise vase", they were trying to use and recreate the ancient techniques to make a hard stone vase of the ancient Egyptian type. They did a remarkable job.

The only "leg" you (and Dunn et al.) have to stand on is this "precision" claim. Nothing about the experimental techniques tell us that further refinement isn't possible or likely. You keep leeping from
Hum well the article shows the pics with it on the turning wheel. Are you talking about Olgas vase. Why would the article lie that Olga used a turning wheel.
I was talking about the one she made in the video I have linked several times and been clear that that was the vase I was talking about. You claim to have watched the video. I have seen that picture, but never have seen any videos featuring it. As I understand it, the pottery wheel was used in the first attempt to make a stone vase in the Egyptian style using stone tools. The vase I keep mentioning was done with harder stone and no pottery wheel. There could be further experiments to come, but we don't know that. You are assuming that those experiments fail before they happen.
But wait, are you not saying that the symmetry and circularity of these vases could easily be achieved by a turning table or lathe. Is not that the explaination for such signatures. Thats what everyone is saying. That this precision could be achieved by some rudimentary turning device.

View attachment 370576
That vase *was* made with a rudimentary turning device. (It's also a bit rough.)
Then stop using them to refute the precision found in the predyanastic vases. Using them as an example of how the same signatures and precision can be achieved.
I don't think you are understanding my firm claims. It is difficult to respond to your precision notions as they are a graspable as seal in an oil spill.

No thats your conflation. You are injecting this because you want it to be that way. You want to turn it into aliens conspiracies. I have simply said if what I am saying is so far fetched then why does just about everyone including on this thread agree that to achieve such precision in symmetry and circularity that its obvious a lathe of some sort would be the way this was achieved.
You imply or infer "lost technologies" that compare to the quality of modern CNC machining and then *NEVER* make any direct claim of what that technology is or why we have ZERO of such technology.
Thats all. I am then saying if this is the case then why not the same for other witness marks that look modern.
"witness marks"?
I clearly said I am not stating any specific tech and I specifically said this does not mean they had some modern looking computerised machine. Thats you making. I said I don't know.
The tell us what that "tech" is. As the ancients say: put up or shut up.
Whatever lol.
 
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stevevw

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I've just deleted a rather lengthy post on log hewing. Suffice to say it's not common knowledge these days and it leaves marks. If you don't know how it's done, those marks are a mystery. Without any insult, if someone's never worked at making stuff by hand, they may be unaware that different steps in the process leave different marks. They would also be unaware of what's involved in smoothing them, or marks left during other aspects of construction. Quite simply, if it's unfinished or not necessary to remove the marks, those marks are going to be there.

That's what we're dealing with here. That scoop shape? That's a consequence of rubbing it back and forth. You can see the same thing where you don't want stuff worn down.

Just a suggestion, and it's one without any insult: Try making stuff. That's all. Just make stuff. See what can be done without the latest and greatest, because the latest and greatest means spending money. Simply making stuff can be an eye-opener.
Yes I guess if you want to work out what may cause a mark then you would try different methods to see the results. In a way thats what I think the experiments in making the vases either by the bent stick method, bow drill, copper saw and the modern machine made vases.

The video actually spectulates on what could cause such scoop marks. Everything from pounding, chiseling, softened stone that leaves scoops and trowel type marks to plasma heat or intense heat that sort of melts and blasts stone away. Which does seem to leave similar marks. Who knows.

I just would not like to be the guys who had to pound all these works if that was the case. In some ways if it was pounding, grinding and rubbing it is more amazing I think. As its more or less freehanding what amounts to todays precision tool making.

If someone today produced a precision part for a racing team from rudimentary tools and freehand it would be unbelievable. We would think they had some sort of magic or extra sensory perception to be able to be so precise.
 
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BCP1928

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If someone today produced a precision part for a racing team from rudimentary tools and freehand it would be unbelievable. We would think they had some sort of magic or extra sensory perception to be able to be so precise.
No, we would just think they knew how to measure their work as they proceeded. At least you have moved on from calling a skilled craftsman's hand tools "primitive." "Rudimentary" is not quite as insulting.
 
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Hans Blaster

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The video actually spectulates on what could cause such scoop marks. Everything from pounding, chiseling, softened stone that leaves scoops and trowel type marks to plasma heat or intense heat that sort of melts and blasts stone away. Which does seem to leave similar marks. Who knows.
Archeologists know. High heat and chemical softening leave signatures that are not present.
I just would not like to be the guys who had to pound all these works if that was the case. In some ways if it was pounding, grinding and rubbing it is more amazing I think. As its more or less freehanding what amounts to todays precision tool making.
Long, tedious work processes don't need to to be continuously checked, just at periodic intervals that are short enough to prevent working past the intended target. "Freehand" work between such measurements works perfectly fine, especially for the rough work like that seen in the "scooping".
If someone today produced a precision part for a racing team from rudimentary tools and freehand it would be unbelievable. We would think they had some sort of magic or extra sensory perception to be able to be so precise.
None of the Egyptian objects we have been discussing were machine parts needing to physically interact with each other. They are decorative objects and storage vessels.
 
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BCP1928

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Archeologists know. High heat and chemical softening leave signatures that are not present.

Long, tedious work processes don't need to to be continuously checked, just at periodic intervals that are short enough to prevent working past the intended target. "Freehand" work between such measurements works perfectly fine, especially for the rough work like that seen in the "scooping".

None of the Egyptian objects we have been discussing were machine parts needing to physically interact with each other. They are decorative objects and storage vessels.
I will only add that a skilled craftsman develops an "eye" for that sort of thing and can judge with reasonably accuracy when it is time for smaller cuts and repeated measurements. When it's time for the finest work, say, with a scraper, the skilled craftsman can also fairly judge by the character of the chip about how much he is taking off. Steve seems to have the notion that working with hand tools is just blindly flailing away at the workpiece with them.
 
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stevevw

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Unfortunately you are totally oblivious of the flaws in the relevant link.


What struck me was the only results you quoted from the link were the circularity and centering errors.
On reading your link things started to make sense including a glaring flaw which invalidates all his results.
Like the mob at unsigned.io he decided to write up his own code using MatLab (why don't these guys make things easier for themselves and use professional software).
Here he limited himself to 2D cuts through the scanned data using a circle fitting code as illustrated.

Since the vase has an inner and outer diameter there is a separate RMSE and dR for each defined by the quality metric M.

View attachment 370586

At this stage I have no issues but then he makes a terrible error by assuming perfect axiality for the model circles where each circular slice made through the vase shares the same common central axis as illustrated.


He has assumed perfect cylindricity (= 0) but as we know from the unchartedX scanned data, for a purported predynastic granite vase, the cylindricity value is large (= 326 μm) at the vase mouth.
If cylindricity is less than perfect each slice made does not share a common centre (x,y) for the model circle which makes the value dR inaccurate as (x,y) changes for each slice made along the z-axis.

Therefore the value of the quality metric defined in the graph is a useless parameter for differentiating a precise from an imprecise vase.


If he had used professional software the cylindricity value would have been calculated not assumed to be zero as would the circularity which also depends on cylindricity.
There is no doubt the results would be very different.
Except the tests did not use the original vase that was tested with the Guage metrology. These are all newly tested vases. Some and in fact most from memory don't even have cyclindric necks or flat lips.
Unfortunately you are totally oblivious of the flaws in the relevant link.


What struck me was the only results you quoted from the link were the circularity and centering errors.
On reading your link things started to make sense including a glaring flaw which invalidates all his results.
Like the mob at unsigned.io he decided to write up his own code using MatLab (why don't these guys make things easier for themselves and use professional software).
Here he limited himself to 2D cuts through the scanned data using a circle fitting code as illustrated.

Since the vase has an inner and outer diameter there is a separate RMSE and dR for each defined by the quality metric M.

View attachment 370586

At this stage I have no issues but then he makes a terrible error by assuming perfect axiality for the model circles where each circular slice made through the vase shares the same common central axis as illustrated.


He has assumed perfect cylindricity (= 0) but as we know from the unchartedX scanned data, for a purported predynastic granite vase, the cylindricity value is large (= 326 μm) at the vase mouth.
If cylindricity is less than perfect each slice made does not share a common centre (x,y) for the model circle which makes the value dR inaccurate as (x,y) changes for each slice made along the z-axis.

Therefore the value of the quality metric defined in the graph is a useless parameter for differentiating a precise from an imprecise vase.


If he had used professional software the cylindricity value would have been calculated not assumed to be zero as would the circularity which also depends on cylindricity.
There is no doubt the results would be very different.
The metrology of the vases in the article you refer to is completely different to that of the guage metrology of the original vase that was the first tested on Unchartedx. In fact these are completely different vases. So assuming those measurements or method from the OV is wrong to begin with.

I don't think the findings are based on the same method. They are measuring individual slices for cirularity and concentricity. Its the individual center points and the error from the center points that is being measured down the vase as far as I understand ie

The classification is accomplished by way of the quality metric, which is a sum of circularity and concentricity errors for the inner and the outer surfaces of the object.

Quality Metric
First, we must clarify what we mean by ‘precision’. Precision is not an absolute but rather a relative measure characterizing how close an object is to its ideal. For example, when machining a part we use tolerances to specify the maximum allowed deviation of the actual shape of the machined part from its ideal given by a dimensional drawing or a CAD model.

However, in the case of ancient Egyptian vases,
we do not have such a priori design documents, which we can use for comparison. Therefore we must abandon the idea of tolerances and define another quality metric. Since the model slices are approximately circular, I decided to evaluate the quality of each slice’s fit to a perfect circle in the least squares sense. The result of the fit is the best-fit radius R, the root mean square error (RMSE), and the best-fit center (x, y), from which I compute the centering error dR =√ (x 2+y 2 ) – Fig. 6.


Small values of RMSE and dR mean that the slice is ‘very circular’ and ‘well centered’ on the origin, while large values of RMSE and dR mean that the slice has ‘poor circularity’ and is ‘poorly centered’ on the origin. Combining the results for all slices, we can compute the average RMSE (<RMSE>) and the average dR (< dR>) for the inner and outer surfaces of a model. Then we can define the quality metric M as follows: M=<RMSEouter> + <RMSEinner>+<dRouter>+<dRinner>.

So its basically finding roundness to a perfect circle in each slice and the error from this ideal. It shows very frational errors in that roundness. Which points to some sort of sophisticated way of ensuring that roundness. Which we have already concluded was some sort of lathing.
 
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stevevw

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No, we would just think they knew how to measure their work as they proceeded. At least you have moved on from calling a skilled craftsman's hand tools "primitive." "Rudimentary" is not quite as insulting.
I don't think your understanding the difference between the limits of human ability and what is required for precision tooling or engineering. The reason we don't use human naked eyesight, feel or artistic expression which precision and engineering is not necessarily a requirement. Because we know its beyond their capability.

For example the micro precision required is beyond human eyesight. We cannot even see at that level to know that the lines being crafted are line in with such precision. Thats why we use programmed computer tech connected to guiding arms that eliminate this human inability.

The fact that most people on this thread acknowledged that the precision in symmetry and circularity was caused by some sort of lathing and not just naked eye and feel is evidence of this.

Or do you say acknowledging that some sort of mechanism that helped them achieve such roundness is denying their skill. It was an aid afterall that helped them achieve such roundness and not their unguided artistry by naked eye or feel.

All some are doing like myself are applying this same logic to other precision in the objects that is beyond human ability and pointing to some sort of guidence, template, stencil or fixed cutter or knowledge that ensured that precision.

I refer back to the articles which categorise the different methods being handmade and CNC made. There are certain thresholds determined beyond handmade with the primitive and I call it primitive compared to CNC and machining. Even if the bow type methods are included because they are no where near as the same as verified by categorising such results in the imprecise.

But scientific testing has placed these in destinct categories with different signatures according to the methods and not whackos.

Once again if everyone can acknowledge precise or even near precise symmetry and circularity requires a lathe (not freehand unaided artistry). Then the same logic can be allplied to other signatures that definitely don't come from the rudimentary methods attributed by orthodoxy.

I cannot see how this is so controversial lol.
 
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sjastro

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Except the tests did not use the original vase that was tested with the Guage metrology. These are all newly tested vases. Some and in fact most from memory don't even have cyclindric necks or flat lips.

The metrology of the vases in the article you refer to is completely different to that of the guage metrology of the original vase that was the first tested on Unchartedx. In fact these are completely different vases. So assuming those measurements or method from the OV is wrong to begin with.

I don't think the findings are based on the same method. They are measuring individual slices for cirularity and concentricity. Its the individual center points and the error from the center points that is being measured down the vase as far as I understand ie

The classification is accomplished by way of the quality metric, which is a sum of circularity and concentricity errors for the inner and the outer surfaces of the object.

Quality Metric
First, we must clarify what we mean by ‘precision’. Precision is not an absolute but rather a relative measure characterizing how close an object is to its ideal. For example, when machining a part we use tolerances to specify the maximum allowed deviation of the actual shape of the machined part from its ideal given by a dimensional drawing or a CAD model.

However, in the case of ancient Egyptian vases,
we do not have such a priori design documents, which we can use for comparison. Therefore we must abandon the idea of tolerances and define another quality metric. Since the model slices are approximately circular, I decided to evaluate the quality of each slice’s fit to a perfect circle in the least squares sense. The result of the fit is the best-fit radius R, the root mean square error (RMSE), and the best-fit center (x, y), from which I compute the centering error dR =√ (x 2+y 2 ) – Fig. 6.


Small values of RMSE and dR mean that the slice is ‘very circular’ and ‘well centered’ on the origin, while large values of RMSE and dR mean that the slice has ‘poor circularity’ and is ‘poorly centered’ on the origin. Combining the results for all slices, we can compute the average RMSE (<RMSE>) and the average dR (< dR>) for the inner and outer surfaces of a model. Then we can define the quality metric M as follows: M=<RMSEouter> + <RMSEinner>+<dRouter>+<dRinner>.

So its basically finding roundness to a perfect circle in each slice and the error from this ideal. It shows very frational errors in that roundness. Which points to some sort of sophisticated way of ensuring that roundness. Which we have already concluded was some sort of lathing.
Your response to my post indicates you fail to understand the problems with the code.

Since the code treats the vase as a 2D object it fails to take into consideration cylindricity which is a 3D property. As a result it doesn’t matter what vase is analysed, the code will undercalculate the centering error and therefore the circularity if the cylindricity is high.

Out of all the versions you have spat out in this thread the only meaningful information comes from unchartedX where they used Polyworks software for the calculations.
Polyworks is the only professional software used in your links and since the ancient Egyptians did not supply CAD data with their vases, the software does not attempt to create an ‘idea’ vase for comparison. Instead it treats each parameter analysed and calculated as a separate independent geometry.
By not creating an ideal vase which includes artefacts such as the Golden ratio, it avoids the misinterpretation these artefacts are real in predynastic Egyptian vases.
 
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stevevw

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"freehand" is the term *you* keep using. You speak of it as unguided, so using anykind of guiding mechanism, from a frame to a lathe, is not 'freehand'. Let me ask a clarifying question.

If a potter uses a wheel and their hands, is that "freehand".
No because there is an aid to help the hands achieve a certain shape. As compared to the hands creating that shape without the wheel. Its really simple. We can determine that the specific symmetry and circularity needed something beyond the unaided hands.

Thats called tech. Like a calculator aids in calculating complex numbers for the mind tech aids help achieve complex precision in 3D objects.
Frankly, yes.

The devices I have seen in the experiments, and archeological record *ARE MACHINES*.
Ok so is there a difference with those machones or devices. Do they help achieve the end result or not. Would not having them make a difference even if they are primitive and rudimenary. Would more sophisticated 'machines' make any difference to the outcome.
The frame or other guiding device is to keep the axis of rotation aligned.
Yes an aid to achieve precision ot a shape.
Guiding mechanism for rotated working of stone is clearly demonstrated. You push it aside because of the precision of one small group of experiments that are *NOT* aiming to replicate that "precision". The objection is not justified.
First just getting the small group has been an effort. Second with more testing it may be many vases. Just on looks alone all the vases in museums look like they have similar precision.

Second I am not pushing aside the mechanism shown to produce such rotated precision. I don't think your seeing the forrest through the tree. Just this simple signature itself is amazing. That some form of lathing was around at such an early time. When the orthodox view was the method was the result of the examples on the walls. That is the exact way they made the devices like on the walls because this was the consensus.

Now this is being walked back and some more sophisticated method is now being acknowledged such as lathing with bearings for stability ect to achieve such precision and roundness. That is well beyond the rudimentary method that was claimed.

The fact that Olgas vase is presented as an example of the rudimentary method and that she used aids to achieve this beyond the claimed method is evidence for this ie

This remarkable circularity was achieved due to the use of the ball-bearing supported rotary table, which is a contemporary piece of technology that was not available to the ancient Egyptians.
https://maximus.energy/wp-content/u...ptian-Stone-Vessels_-A-Metrological-Study.pdf
You keep getting the argument and proof claims backward. you have repeatedly claimed that the experimentally demonstrated can't be by such methods when that is simply not true. The experimenters were not trying to make a "precise vase", they were trying to use and recreate the ancient techniques to make a hard stone vase of the ancient Egyptian type. They did a remarkable job.
You keep saying this but then use the method to claim this is how the precision vases were created. Or at least the orthodoxy does. Whenever it is asked how these precision vases were made it is the method presented.

Only in recent years has there been an acknowledgement that a more sophisticated lathing was involved. Thats because the signatures from the wall methods even if just trying to recreate them is inadequate fullstop. There is no way no matter how long they take that it will produce the same results fullstop.
The only "leg" you (and Dunn et al.) have to stand on is this "precision" claim. Nothing about the experimental techniques tell us that further refinement isn't possible or likely. You keep leeping from
Yes it does. The rudimentart method as proposed on the walls, as used in experiments does not have the required stability to achieve such levels of roundness. You have acknowledged that a sophisticated lath was used. Not just any wobbly lathe but one with bearings and fixed points to ensure that precision.

The current experiments just in basic terms of mechanism are potentially incapable because they are not a stable way of cutting the interior let alone the mechanism that somehow does the outside. Which would require applying the same roundness stablity from the outsidfe.

In otherwords a lathe. I cannot see any lathes on the walls or in any Egyptian accounts. Especially at a time which did not even have the potters wheel let alone some sophisticated lathing.
I was talking about the one she made in the video I have linked several times and been clear that that was the vase I was talking about. You claim to have watched the video. I have seen that picture, but never have seen any videos featuring it. As I understand it, the pottery wheel was used in the first attempt to make a stone vase in the Egyptian style using stone tools. The vase I keep mentioning was done with harder stone and no pottery wheel. There could be further experiments to come, but we don't know that. You are assuming that those experiments fail before they happen.
I don't know. All I know is that the two vases used as handmade on the traditional tools are from Olga the same one who made the vase you refer to.

Ok so I just checked the specific vase being used by Olga and the video definitely shows the use of a blue plastic potters wheel with consideratle stability and speed.

This is the point. This specific vase by Olga though very good any near precision she achieved in roundness was due to the aid of a lathe type mechanism to ensure roundness. She uses a marker to highlight the uneven surface and then works on those areas to achieve good roundness. Without it she would not come near this.

This pic is from her video and coincidently it is hosted by the same guy who I seen in the Scientists against Myth series who was trying to reproduce granite cores and they also cheated.

You can see the spin of the wheel and the use of a pencil to find imperfections. This may not be your video but this is the vase that was tested with the one in your video from the same Olga.

By the way the video below actually states that the purpose of the experiment was to show that the traditional method could produce the predysnastic vases.

1758880560324.png


[youtu.be]
That vase *was* made with a rudimentary turning device. (It's also a bit rough.)
The vase in the video you linked is from the same women Olga. The vase in that video seems made from marble and not granite. It looks like the one included in the testing here. One on right. But the one I am talking about was Olgas best effort and closest to precision is on the left.

1758881383036.png


But like I said it was aided by modern tech which only supports that something beyond the primitive methods was used. The examples in your video will never achieve such precision without some modern tech that stablises and fixes or guides the cutting to be so precise.
I don't think you are understanding my firm claims. It is difficult to respond to your precision notions as they are a graspable as seal in an oil spill.
I disagree. Its really simple. Precise or near precise roundness takes more than the rudimentary methods claimed. The wonkiness of the primitive methods excludes them. Something more elaborate or sophisticated was required and the tests are evidence of this.

In fact the simple acknowledgement by everyone that some sort of fixed lathing was required for the symmetry and roundness regardless of anyithg else is enough evidence that it took more than what the orthodoxy claims from the wall paintings and methods tried in replicating such.
You imply or infer "lost technologies" that compare to the quality of modern CNC machining and then *NEVER* make any direct claim of what that technology is or why we have ZERO of such technology.
Does that somehow negate that such witnes marks point to that level of knowledge or tech or way of achieving such precision. Its only a forensic analysis of marks and what can cause marks. Its just as much a refutation of the orthodox methods as it is in pointing to something advanced.

Either way it refutes the rudimentary methods claimed. That we cannot determine what actually caused such marks is another issue. Maybe its on a completely different realm as to how such results can be achieved from the gradualist and reductive and material sciences.

Like I said one possibility could be messing with nature. With the chemistry or physics or stone that allows such manipulations. But this is mere spectualtion in an attempt to understand how. I think this is ongoing research and investigation.
"witness marks"?
Yes the same as signatures. The marks that give witness to what caused them. You can tell the difference in the withness marks of a bullet hole or a knife mark. In fact nowadays we can tell the type of bullet from the marks.

The circular saw cuts in ancient stones that some recognised on this thread and said they were modern forgeries. The mark was a witness as to being modern and not ancient. Or at least something primitive tools could produce. Therefore its witness caused people to say its a modern forgery. The marks give witness to the method.
The tell us what that "tech" is. As the ancients say: put up or shut up.
I have given my spectualtion about how these out of place works may have been achieved. That is like Indigenous knowledge for which science now acknowledges is far more sophisticated and even scientific then was realised.

But not scientific as in western sciences which look from the outside in. These ancients were immersed in nature. They experienced nature and therefore gained knowledge that is deeper than the scientific materiams today which tries to mimick nature from the outside.

How this specifically works and translates into reality, into these works I don't know. But as they have common aspects such as natural geometry and astrology ect this has something to do with it.

You have to remember that these ancients did not have the modern world view of enlightenment. Everything was within a transcedent reality that seems very spiritual. Everything was related to the gods or some transcedent reality that aligned their world.

Modern material science relegates this is make believe and superstition. But I don't think so. I think there is some connection which gave a deeper knowledge of reality that we have lost.

And I know what skeptics will say. This in itself is fantasy and make believe. So lets see the empiricle evidence lol. But still this is the developing idea that ancient and Indigenous knowledge was more than make believe and contained advanced knowledge we have lost.

What we see in the ancient out of place and amazing works was the visible expression of this.
 
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stevevw

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Your response to my post indicates you fail to understand the problems with the code.

Since the code treats the vase as a 2D object it fails to take into consideration cylindricity which is a 3D property. As a result it doesn’t matter what vase is analysed, the code will undercalculate the centering error and therefore the circularity if the cylindricity is high.
But if individual slices of the vase are taken and measured for roundness as to a perfect circle and they pretty well on average all align it would not matter. The roundness is calculated for the entire circle to all outside and inside walls. How far they deviate from a perfect circle.

Why would they conclude that the circularity and concentricity was near perfect. Also your fogetting that the predynastic vases were compared to actually real 3D CNC modern made vases. For which they feel within and even exceeded in a couple of vases.

If the modern CNC vases for which we know have good 3D roundness have the same or even less roundness as the predynastics. If they meet or beat the modern CNC vases and have the same signatures what exactly are you saying is not advanced in them.

You seem to be whinging about something that is not there. The vases have been deemed high precision on par with modern CNC machining by several independent tests with different methods. That is good science.
Out of all the versions you have spat out in this thread the only meaningful information comes from unchartedX where they used Polyworks software for the calculations.
Polyworks is the only professional software used in your links and since the ancient Egyptians did not supply CAD data with their vases, the software does not attempt to create an ‘idea’ vase for comparison. Instead it treats each parameter analysed and calculated as a separate independent geometry.
By not creating an ideal vase which includes artefacts such as the Golden ratio, it avoids the misinterpretation these artefacts are real in predynastic Egyptian vases.
Ok so all these independent tests and findings are wrong and your unqualified and unsupported findings are correct. Write a paper and send it in and let me know so I can see if it stands the test and scrutiny lol.

All I can go on is the actually published work and findings which state the complete opposite. They clearly say that these vases are on par with modern CNC machining. If you think they are wrong then submit a refutation. Thats what you demanded from me that only peer reviwed and actual submitted science counted.

But then I don't even have to go that far. The fact that the symmetry and roundness is enough that most people acknowledge some sort of sophisticated lathing was needed well beyond the rudimentary method on wall paintings and proposed in experiments is enough.

This shows that to achieve such results took more than the orthodox methods which are unstable and wobbly or can even work on the outside of a vase with precision. Almost like they want to build a precision lathe out of sticks and stones lol.

Its just a case now of to what degree the level of tech was need now. Just like the orthodox is jumping from rudimenary wobbly device to a more sophisticated lathing. So it may continue to be acknowledged.

It also lays the ground that perhaps other works and results may not have been caused by the orthodox methods as well. I guess its a case of more and more results so that we get a bigger data base.. More independent testing.
 
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stevevw

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I will only add that a skilled craftsman develops an "eye" for that sort of thing and can judge with reasonably accuracy when it is time for smaller cuts and repeated measurements.
Yes reasonable accuracy. But I also think it depends on the material and art being done. A painting is different to installing that 2D pic into 3D reality in the hardest stones. Like clay is fairly easy and you can create a beautiful looking vase freehand. In fact vases with geometry that is off center or have crooked lines is in some ways more beautiful when it comes to art.

But theres a difference between that is precision down to the micro level which requires more than feel and normal vision. Though I don't disagree that humans can have an almost supernatural ability to sense and feel great art. I think of the idiot servants whoi can create such detail in minister art works.

As though completely focused on something to the point they become specialists at it beyond what we would usually attribute as normal ability. But also having some transcedent ability beyond intellect and normal ranges of our senses. But that in itself is an unknown aspect of human ability and knowledge.

When it's time for the finest work, say, with a scraper, the skilled craftsman can also fairly judge by the character of the chip about how much he is taking off.
Ok fair enough. But as we know with humans we can over estimate or our touch and strength in using tools which can vary due to twiches, weakness, lack of concentration ect. Its hard to believe that they got just the right chip or rub down to the micro level without going over or under. Only a couple of times by a hair or two.
Steve seems to have the notion that working with hand tools is just blindly flailing away at the workpiece with them.
I guess its a matter of degrees. I am not saying that humans don't have great ability to get close to perfection with their naked senses. But even a simple tool in principle is an aid.

All I am doing is extrapolating this same idea for the precision and other signatures. I cannot see how this is a problem like you have implied. If I am underestimating the ability of humans (with simple tools) like chisels which help achieve the end result. Then why not more sophisticated tools to help achieve the end result.

You actually acknowledging the principle that its not just humans unaided but with various tools that help achieve the end result. Its just a case of to what extent.

Some say the basic tools and human effort achiieved it and others say there was more tool tech than the primitive to help achieve it. Its just a case of what level of human ability and tech. What is the threshold as to what can be achieved without tech. Or with primitive tools.
 
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Stopped_lurking

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But if individual slices of the vase are taken and measured for roundness as to a perfect circle and they pretty well on average all align it would not matter. The roundness is calculated for the entire circle to all outside and inside walls. How far they deviate from a perfect circle.

Perhaps I'm not understanding @sjastro but this is what his post got me thinking about. I would guess that the best measure for the 0,0 point of each slice is not correctly appointed by minimizing the RMSE and dR for the perfect slice best fit to each slice. Instead the 0,0 point should be appointed by the best rotational axis for the whole vase, and then you would calculate RMSE and dR for a suitable number of slices or finite elements.

Why would they conclude that the circularity and concentricity was near perfect. Also your fogetting that the predynastic vases were compared to actually real 3D CNC modern made vases. For which they feel within and even exceeded in a couple of vases.

If the modern CNC vases for which we know have good 3D roundness have the same or even less roundness as the predynastics. If they meet or beat the modern CNC vases and have the same signatures what exactly are you saying is not advanced in them.

You seem to be whinging about something that is not there. The vases have been deemed high precision on par with modern CNC machining by several independent tests with different methods. That is good science.

Which vases has been measured more than once by which groups? Deemed high precision by who, and where have they published it scientific journals. Have any of their findings been through peer review?

Ok so all these independent tests and findings are wrong and your unqualified and unsupported findings are correct. Write a paper and send it in and let me know so I can see if it stands the test and scrutiny lol.

So why don't you link to the journal articles regarding these vases. Until we see those I guess the best critics are we here on christianforums.com

All I can go on is the actually published work and findings which state the complete opposite. They clearly say that these vases are on par with modern CNC machining. If you think they are wrong then submit a refutation. Thats what you demanded from me that only peer reviwed and actual submitted science counted.

But then I don't even have to go that far. The fact that the symmetry and roundness is enough that most people acknowledge some sort of sophisticated lathing was needed well beyond the rudimentary method on wall paintings and proposed in experiments is enough.

This shows that to achieve such results took more than the orthodox methods which are unstable and wobbly or can even work on the outside of a vase with precision. Almost like they want to build a precision lathe out of sticks and stones lol.

Its just a case now of to what degree the level of tech was need now. Just like the orthodox is jumping from rudimenary wobbly device to a more sophisticated lathing. So it may continue to be acknowledged.

It also lays the ground that perhaps other works and results may not have been caused by the orthodox methods as well. I guess its a case of more and more results so that we get a bigger data base.. More independent testing.
No, what they should do is to go out and look for the tools that they think are needed to make these vases. Saying this vase looks so nice so it must have been made with advanced tools is not evidence of the advanced tools.
 
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stevevw

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Perhaps I'm not understanding @sjastro but this is what his post got me thinking about. I would guess that the best measure for the 0,0 point of each slice is not correctly appointed by minimizing the RMSE and dR for the perfect slice best fit to each slice. Instead the 0,0 point should be appointed by the best rotational axis for the whole vase, and then you would calculate RMSE and dR for a suitable number of slices or finite elements.
Do you mean as a 3D object as in this case the 3D vase roundness. The question would be in the qualifying comments on method the basis for determining the precision was premised on tolerances in CNC machining.

No matter how you want to frame the methods the signatures, the measures are made consistent across the three examples (predynastic, modern CNC and handmade). The measures for the predynastics were the same as the modern CNC vases and a couple exceeding them. The handmade fell well below.

That the signatures (machining marks) matched the modern CNC vases and not the nandmade is evidence in itself. In fact the opposite sort of experiment was done in getting a vase manufacturer to make a copy of a predynastic vase and the results were similar with the predynastic exceeding the CNC vase.

The evidence is more than someones interpretation of the measures. I would like to see a paper or scientific analysis submitted on critiquing the measures and findings.

Lathe Marks
Given these results, I conclude that the ‘PRECISE’ vases in Matt Beall’s collection were machined using advanced tools since the lathe marks are clearly visible on the inner surfaces of the vases where they were not polished away completely – Fig. 20.
Which vases has been measured more than once by which groups? Deemed high precision by who, and where have they published it scientific journals. Have any of their findings been through peer review?
As far as I know there are 3 main tests by independent sources. I have given two which are from UnchartedX which has several links to different tests. Other tests include Gamma and X ray. One test looking for metals and magnification of tool marks.


Also maximus.energy on the optical and CAT scans processed into 3D models


Also gamma spectroscopy

XRF spectra

Another set of tests was done at the Petrie museum using a micron-accurate 3D structured light scanning. Said to be the most accurate scanning method with a precision of around 5 to 10 microns. Alco CT scanning of around 1 micron. I think similar to those done at Maximus above.

This video covers most of the different indeendent tests done with links. The good thing is that its presented so that you can do your own investigation and see for yourself.

So why don't you link to the journal articles regarding these vases. Until we see those I guess the best critics are we here on christianforums.com
The problem is because this is a relatively new sector its yet to be established. Especially in mainstream journals who already reject the idea of ancient advanced knowledge and tech. First you have to have access to vases and equipement which is not cheap. Museums are reluctant. Others can certainly do tests if they want to replicate or not.

But the tests and papers are there in the links. They are open sources so anyone can have acess and check the results an dthen refute them. I am not sure a forum is the right place. No more than it would be for determining the findings of tests in physics.

Write a paper refuting the findings and publish it in some way with independent support. At least then its formal and published like the original tests for everyone including the original testers so they can respond to criticism of their own work.

Otherwise I have two conflicting claims and one comes from a formal and published scientific source, done at Petrie museum meaning they have gone through the protocols of at least formalising the process. Compared to someone on a social thread.

Not just that as I linked above there are several tests, in different methods by independent sources all coming to a similar finding. That is the peer review and verifiation itself. Good science is replicated science.
No, what they should do is to go out and look for the tools that they think are needed to make these vases. Saying this vase looks so nice so it must have been made with advanced tools is not evidence of the advanced tools.
They have and they found lath marks. They are different to chisel marks for example. But regardless its just plain common sense that good symmetry is usually the result of lathing and not freehand. You don't need to go out and try different tools.

Its just a well acknowledged sign of lathing. We don't usually say that something with such good roundness or symmetry was done freehand without a lathe. We immediately relate this to lath. Why then change this because its found in a time that should not have lathes.
 
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