So those of us who are capable of producing high degrees of precision with hand tools are just lying to you?
It all depends on what you regard a high degree of precision as. I am not saying that humans are capable of great things. But we do draw lines and we do have limitations. That is why I think investigating the works is so important as it will help determine this.
But lets say we have a precision jet engine part which is done on high tech computerised machines. Its 3D and works to a complete math and geometry. I don't think a human is capable of replicating this by hand tools. Its just on another level.
We can even track the evolution of precision. We only started to get to this level through the industrial age. Even then it was still not precise but it gradually became more precise.
So even if we say that these primitive people somehow hand made these works which I don't think they did with the tools they had they are still producing modern day levels of works which should still be regarded as highly advanced. That somehow they could mimick modern tech with ancient tools would in some ways be more astonishing than if they had some machine that was lost to do it.
BTW, I'm old enough to have been around the trade when computer controlled machine tools were came out. They were pioneered by the General Electric Company, which had a contract with the Air Force to make turbojet engines. Turbojet engines have many blades which have a complex shape and have to be produced to a high degree of precision. It is possible to make these blades by hand or with manual machine tools to any desired degree of precision. Computer controlled machine tools were introduced to make these blades faster, thus cheaper--not more precise.
Ok. Well I don't know. We need more evidence than just andedotal. If you look at how these vases for example have complex math and geometry in them its not something that can be created by feel or sight.
Its not so much that you can create one piece with a couple of reference points. These vases in some places have around 70,000 rewference points that align. If you were to under or over rub or grind one tiny part of the vase you throwing the rest out and that applies to every reference point on the vase.
There comes a point where you have to acknowledge human limitations. Its like the mega blocks. To say 1,000s of primitive people with small sleds and hemp rope somehow moved these blocks when we have problems today with modern machine.
You have to say no this is beyond what they can do. There must have been something else to this story. But you don;t just assume oh well the experts say it was with a sled, hemp rope and manpower so it must be true.
But it doesn't matter. Lets just call them amazing humans for being able to do what they did at a time when we did not expect it. Remembering that before these works we were suppose to be primitive H&G. Then bang comes these precison and megalith works. Then they more or less disappear. So in that context we could say it was unique period of history.
Without getting into how they did it.