Is my red the same as yours? — TiredThinker
The analytic answer is that there is no my red; that rather, red is a notion constructed by our communal use of language. — Banno
What do you mean? — TiredThinker
the perception of color is as defined as the wavelengths that produce it? — TiredThinker
What do you mean — TiredThinker
I was wondering if the perception of color is as defined as the wavelengths that produce — TiredThinker
The tetrachromates said things like that was why they must have struggled in the shop to get the right thread to colour match a garment. The shop assistant thought the orange was a perfect match and couldn’t see how far off it was. — apokrisis
Just as we use our fingers to point we use language to point. So it's more like our communal pointing to a colored experience. The OP is asking how do we know that what we are pointing to is the same? Being that words are just other sensory impressions, we use sensory impressions to point to other, more complex, sensory impressions. Language is used to communicate complex ideas more efficiently.The analytic answer is that there is no my red; that rather, red is a notion constructed by our communal use of language. — Banno
Red is an interaction between the world and your sensory system. Once the apple-light system interacts with your eye-brain system, it no longer is the same interaction as the interaction of the apple-light system with my eye-brain system. We are two separate beings, and our systems process the information of the apple-light system separately. So to ask if your red is the same as my is red is silly question to ask.Is my red the same as yours? — TiredThinker
Humans generally have three cone types and see colors under well lit conditions. The primary bio-physical layer is established by photopsins, which are light sensing proteins. Each photopsin has a particular probability of absorbing each photon that goes by; this probability changes as a function of frequency and the photopsin. When absorbed the photopsin folds (isomerizes), releasing a chemical that begins a chain reaction leading to your cone signals. There are three photopsins involved here; erythrolabe, chlorolabe, and cyanolabe. Since they either fold or not, and each is sensitive to a broad range of frequencies (just by different amounts), the eye isn't really measuring wavelengths; the best way to describe what this is a measure of is simply to point to the photopsins... it's a three dimensional measure of three kinds of photopsins folding.I was wondering if the perception of color is as defined as the wavelengths that produce it? — TiredThinker
"Red" is part of a language game played by a community. — Banno
Does the same go for Locke's primary properties? — Forgottenticket
To speak loosely at an intuitive level (invoking a pseudo-teolology), it's a misnomer that the color visual system is attempting to reconstruct wavelengths, or model the wavelengths of light. Our color visual system apparently does not care one iota what the wavelengths really are, and why should it? What our visual system seems to focus on, instead, is recognizing and distinguishing objects. — InPitzotl
To speak loosely at an intuitive level (invoking a pseudo-teolology), it's a misnomer that the color visual system is attempting to reconstruct wavelengths, or model the wavelengths of light. Our color visual system apparently does not care one iota what the wavelengths really are, and why should it? What our visual system seems to focus on, instead, is recognizing and distinguishing objects. — InPitzotl
Here is someone who knows what he is talking about! :strong:
This is bang on. It is not about seeing "colour" as it is in the world. Reflectance is simply a valuable property to make things in the world "pop out".
The appealing idea is that primates re-evolved red-green hue discrimination after shifting back from a nocturnal to diurnal lifestyle. If you want to see ripe fruit in distant trees, the three pigment visual system looks well designed to make that kind of discrimination as effortless as it could be.
So colour is primarily about making quick sense of shapes - discriminating the reflectance properties of surfaces and so being able to see through to the objects that might have that particular kind of surface — apokrisis
Our eyes and brains interpret frequencies. — turkeyMan
Cameras see your red as my red however i suppose its possible i see red as blue and you and a friend of yours sees red possibly as someone elses yellow. — turkeyMan
Get involved in philosophical discussions about knowledge, truth, language, consciousness, science, politics, religion, logic and mathematics, art, history, and lots more. No ads, no clutter, and very little agreement — just fascinating conversations.