Timeline for answer to Is not sensing "like" something by nrphil
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| when toggle format | what | by | license | comment | |
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| Aug 21, 2014 at 21:36 | comment | added | nrphil | Let us continue this discussion in chat. | |
| Aug 21, 2014 at 21:25 | comment | added | nir | There are various forms of color blindness; most commonly the green receptors spectral sensitivity is shifted too close to that of the red receptors, and the result is that the green and red receptors signal the "same" information, and as result the brain can distinguish between fewer colors. An analogy to what it is like is that if you can look at a number between 0 and 10 and say with confidence 2.3 or 6.7, I will look at it and may only tell if it is 2 or 7, and will often confuse a 6 with a 9. | |
| Aug 21, 2014 at 21:09 | comment | added | nrphil | @nir That's a good point. Are you saying that the retina prevents the data "red" from being encoded electronically before being transmitted to the brain. In this case, apparently the brain assigns a colour to the image. That colour is what that individual calls "red" and the brain appears to respond to the absence of "red" colour data consistently over time. Similarily, suppose that damage to the thalamus prevents colour data from being distributed correctly. Then the corrupted data processing would still be "red" for that individual. | |
| Aug 21, 2014 at 20:42 | comment | added | nir | @NickR, hmm, you are right, sorry. Nevertheless, for color blind people information is most commonly already lost at the retina because of spectral sensitivity problems with the color receptors. | |
| Aug 21, 2014 at 20:20 | comment | added | nrphil | @nir I must confess to being entirely perplexed by your comment. My answer is no, a house does not have any of the necessary attributes - i.e., a brain, optic nerve, etc... | |
| Aug 21, 2014 at 20:13 | comment | added | nir | @NickR, in your sense of seeing, does a house see the sky because light from the sky enters the house through the open window? | |
| Aug 21, 2014 at 20:05 | comment | added | nrphil | @user3293056 I agree with you. It is just that any individual's brain interprets the data "red" in a manner differently from everyone else. | |
| Aug 21, 2014 at 20:02 | comment | added | user6917 | i am not sure that people who lack e.g. red colour vision lack the "visual sense of red", in any way other than not seeing reds | |
| Aug 21, 2014 at 19:55 | history | answered | nrphil | CC BY-SA 3.0 |