Is there an objective morality?

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stevevw

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You seem to be missing my point. When we take into account that perception of colour depends not just on the physical structures of the eye, but also they way that information is interpreted by the brain, it's entirely plausible that the colour perception of Person A is different to that of Person B.

Color Is Subjective - ExtremeTech
But because there are physical reasons for the way light waves work, pigmentation, and eye cone function the interpretation is restricted to a certain range. Its not as if one person can see blue and the other red under normal circumstances without some problem in the eye cones or other mechanisms.

The spectrum range for blue is completely different to red. You can't imagine or interpret red out of blue. There may some variance in the same colour between people because they will end up interpreting blue with a slightly different shade within the blue range. But that's still the same colour and usually has a logical reason such as differences in illumination due to time of day or the position someone is viewing things from.
 
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Ken-1122

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That doesn't mean that everyone is seeing it the same.

If we both look at a stop sign, we can both recognise it as red. But what you see as red could be what I see as blue, you just call it red.
Interesting theory. Do you know of any evidence to support this theory?
 
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Kylie

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But because there are physical reasons for the way light waves work, pigmentation, and eye cone function the interpretation is restricted to a certain range. Its not as if one person can see blue and the other red under normal circumstances without some problem in the eye cones or other mechanisms.

The spectrum range for blue is completely different to red. You can't imagine or interpret red out of blue. There may some variance in the same colour between people because they will end up interpreting blue with a slightly different shade within the blue range. But that's still the same colour and usually has a logical reason.

The eye will receive the same signals, but that doesn't mean the brain is going to interpret them the same way.

Interesting theory. Do you know of any evidence to support this theory?

Your Color Red Really Could Be My Blue
 
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Chriliman

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Because two colours that look different to us would look the same to them. The fact that colour blind people exist at all shows that colour perception is subjective, not objective.

Imagine someone associating the intensity of red with cold, or the calm of blue with hot. Crazy
 
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Ken-1122

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Hans Blaster

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Imagine someone associating the intensity of red with cold, or the calm of blue with hot. Crazy

Red stars are cooler than blue stars. A lot cooler.

We (most humans, not astronomers) only think of red as "hot" because the things in our personal experience that glow with their own heat (rather than reflected light) like fires, embers, hot pokers, stove burners, etc. are red because they are just hot enough to glow in the red part of the spectrum (rather than in the IR where we glow). Blue things (or blue/white things) tend to be cooler than fire: water, ice, the air (sky).

In short: Red *is* cooler than blue for object glowing by their own heat.
 
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.Mikha'el.

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Would you say that the user's manual that Ford distributes with their vehicles is an objective measure of how to use the vehicle?

It's a faulty analogy. It's unquestionable that Henry Ford and the company that bears his name exist. One can't say the same about a divine being. The second one leaves the world of fact and enters into the realm of faith, objectivity no longer applies.
 
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stevevw

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Red stars are cooler than blue stars. A lot cooler.

We (most humans, not astronomers) only think of red as "hot" because the things in our personal experience that glow with their own heat (rather than reflected light) like fires, embers, hot pokers, stove burners, etc. are red because they are just hot enough to glow in the red part of the spectrum (rather than in the IR where we glow). Blue things (or blue/white things) tend to be cooler than fire: water, ice, the air (sky).

In short: Red *is* cooler than blue for object glowing by their own heat.
I think colours like red are also signals that represent important signs for creatures for example to avoid or be attracted to. No just red but many colours in nature. So its important that all creatures can perceive the same colours as a matter of survival even.

Another fascinating thing about colour is that some creatures can mimic colours as though all living things perceive colour the same. The colour they reflect just happens to be the colour that saves them or allows them an advantage.

So colour becomes an important part of survival. Imagine if creatures seen different colours for these vital colours in nature. It would be a matter of life and death if colour is an individual perception. It seems creatures can naturally reflect the exact colours that have important meaning and all other creatures understand this.
 
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Kylie

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I think colours like red are also signals that represent important signs for creatures for example to avoid or be attracted to. No just red but many colours in nature. So its important that all creatures can perceive the same colours as a matter of survival even.

I don't think so. All we need to to have the association that a certain colour carries a certain meaning. We both associate red with danger, even if what you call red is more like my blue.

Another fascinating thing about colour is that some creatures can mimic colours as though all living things perceive colour the same. The colour they reflect just happens to be the colour that saves them or allows them an advantage.

Again, this doesn't require perception of colour to be objectively the same. A green insect on a green leaf may be hard to see, but if the colour I call green appears to you the way orange appears to me, it's still an insect that matches the colour of the leaf it's on.
 
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stevevw

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I don't think so. All we need to to have the association that a certain colour carries a certain meaning. We both associate red with danger, even if what you call red is more like my blue.
I don't know about that. I don't think colours work in isolationbut rather in combinations and contrasts with the environment. Red is a vivid colour and its combination with say black is what signals the danger or attraction. I don't think blue is as vivid and contrasts as well. A creature would be at some disadvantage compared to creatures that see the vivid contrast.

Again, this doesn't require perception of colour to be objectively the same. A green insect on a green leaf may be hard to see, but if the colour I call green appears to you the way orange appears to me, it's still an insect that matches the colour of the leaf it's on.
But I think this is seeing colour in isolation. Its not just the specific leaf and insect involved in colour experience and perception but also the background and surrounding environment which is also coloured. I would imagine changing one basic colour would have some knock-on effect on its combination with other colours and the environment which perhaps causes some disadvantage.
 
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stevevw

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The eye will receive the same signals, but that doesn't mean the brain is going to interpret them the same way.
Your Color Red Really Could Be My Blue
Yes I've read this article. But they are talking about how the eye cones that are tuned to the specific frequency waves for red are out of sequence and instead tune into blue on the spectrum. Its not as if people with the usual eye cones for receiving light frequencies for red can just interpret red as blue because the same signal has not gone to the brain in the first place.
 
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