Does your RED look the same as my RED?

This is a lecture video about the inverted experience thought experiment, as well as about the scientific evidence that some percentage of men are, in reality, red-green color inverted. This is part of an introductory level philosophy course.

[abbeyjane]

You have single handedly helped me pass my Philosophy of the Mind module. Thank you so much for your channel!

[ronfrancis]

Regarding the warm / cool part of the talk, because this is a psychological experience, those that see red as green would still say that it was a warm colour, because to them, a fire would look green and feel warm. Also there would be some conditioning involved where people would be saying or teaching that their perceived 'green' was a warm colour. (Imagine an art teacher teaching which colours were warm and cool.)

Also, purple is only a unique colour because of language and there is no way it can be regarded as a pure colour in colour science. There are 4 primary psychological colours, red, green, yellow and blue. All other colours are considered mixtures. And there are only 3 in additive light which are red, green and blue, which roughly correspond to the L, M, S cones in the retina, with all other colours being mixtures.
So I think the purple, yellow/green argument is fallacious.

[fmac]

I remember thinking about the possibility of inverted qualia when I was about 11/12 years old, imagining about people seeing other people thoughts.
In the end I assumed it was true and irrelevant and went on with my life, never thinking that I had accidentally bumped into a real philosophical doubt

[GynxShinx]

Everyone could have the same favorite color qualia-wise.

[bobstovall]

I just discovered your channel. I'm a technician and a bit of a nerd and, while philosophy has always held some fascination for me, it has never really appealed all that much to me. The two presentations by you that I have watched have given the subject new meaning for me. Thank you. Shalom.

[stogieltd]

Unbelievable! I just stumbled into your channel. I've contemplated this quandary since I was a teenager. I had a color blind friend and we had some really deep conversations over it. I realize that being color blind is not the exact same thing but it was the segway to the inverted qualia idea. I have brought this idea up to so many people and it seemed that I was the only one that ever questioned it. I've absolutely explained my theory almost verbatim using fire engines and tomatoes compared to grass and trees. However, I could never really get anyone to agree with me or to even show much interest so I actually thought that I was the only one that ever explored this possibility, let alone did I know it actually has a name! Inverted qualia. I feel like I just found another human being on what I presumed to be a deserted island. Thank You! By the way, I've just became a subscriber.

[HyarionCelenar]

Your question @6:10 is equivocating between red and red-ness and green and green-ness.

[koenth]

The argument around 15:00 about 'pure' and 'mixed' colors presumes that these are a universally percieved. I doubt the validity of that argument.

Being a phonetician, just playing around, I once asked some Dutch and Hungarians which of two sounds sounded more complex to them.
These sounds would be represented in English by 1./s/ and 2./sh/, in Dutch by 1./s/ and 2/sj/, and in Hungarian by 1./sz/ and 2./s/ respectively.

All of the Dutch judged sound 2. to be the more complex, but all of the Hungarians chose sound 1.
Clearly, a seemlingly objective quality like simple/complex may be influenced by the complexity of the writing or labeling that is associated with it culturally.

Similarly, using separate names for certain colors, could contribute to perceiving those colors as more 'pure'.

[gabrielteo]

You could say the functionalist is describing the function for each individual not every person who ever lived. Had there been 2 identical persons with identical brains in identical situations, there is no reason to think their experiences would be different.

[erikven]

As long as there is a qualifier that is independent from the individual's experience (a.k.a non-subjective), for an experience, it can be very easily told if a person is experiencing inverted qualia or not. For example if you show the person the color red written the wavelength of the color under it, and the same with green and ask them to write down the number of the wavelength of the color that resembles a tomato, you will know if the person is color inverted or not. (If they write down the wavelength of green, they are color inverted) Am I missing something?

[raymaxwell]

I am an electronics engineer who spent the last seven years of my life as a color scientist. Working with laser based and LCD color proofing systems. The three types of cones are long, medium, and short wavelength photo pigment sensitive areas. Long is what you refer to as red, medium is green, and short is blue. I can get a colormetric match in a normal humans by stimulating both the long (red) and medium (green) cones. The person will perceive yellow. I can do this with a single wavelength of light (yellow) or I can get the same perception by mixing red and green light from an LCD screen.
If I mix blue and red light the person will perceive magenta. There is no single wavelength of light that produce this same perception. Now if the person has the red and green reversed connections it would be able to produce this same perception with a single wave length of light that overlaps blue and green. This is an objective way to detect if these people exist. I am a functionalist. Talk with a color scientist if you want to know more...BTW I am an anomolus trichromat. A person who sees all wave length of light, but sees luminance differences stronger than color differences that "normal" people see. This can be discovered with a series of tests. I found this out when I applied to get a commercial pilots license. I was able to get that license by using the 100 hue Farnsworth test instead of the Ishihara dot test.

[TechnologieGlobeOculaire]

There's no way to know if any two people experience color the same way. Maybe the colors we experience are as unique as we are.

..

[pashute]

Protanopia and Deuteranopia are types of Anopia.
Greek: An - meaning un, without. Opia - meaning vision

Protanopia. Prot - from proto greek meaning first of a pair. Green looks more red.
Deutranopia. Deuter - from deutero latin meaning second of a pair. Red looks more green.

Protanope - a protanoptic person with protanopia who has the condition of protanomaly.
Deuteranope - a deuteranoptic person with deuteranopia who has the condition of deuteranomaly.

(Optal - visionary, about vision.
Optic - from French short from Greek opticus,
which comes from Greek: opto - visible and ikus - adjective suffix)

[demiaanderson]

Okay I'm looking this up because I found out I'm color blind. But I thought that meant I can't see colors. No, I swear to you my greens are blues, certain yellows and oranges are pink, I thought my parents taught me wrong. One day i changed my shirt to a shirt I thought was pink. I don't like the color. My fiance during game night said he liked it, I said " I'd like it more if it wasn't pink" everyone stopped and stared at me and was like...thats yellow. Then we later went over flash cards and to me I was like no was these cards have to be wrong...

[ben_b_blake]

It is now the second video of you that I watch and I experience a deja vu. I read William Poundstone's Labyrinths of Reason 30 years ago...

[MH-wdfb]

In college, I was diagnosed with red-green color blindness. I did not know. I could identify reds and greens, but one time I was told I got it wrong. I would have kept my functional state had I not been told. Now I have a practical difference. The difference I experience for red and green would not create a different quality experience. I just believe what I was told. I would not even know if it wasn't for the eye diagnosis and the feedback.

[lIIIIIIl]

I remember seeing a movie back in the day, probably sometime in the 80s, where there was a guy falling in love with a girl who had been blind since birth, and he was trying to explain things he could see to her. She was having trouble with the concept of color. He asked her to come over the next day so he could try to explain color. He put a stone in the freezer overnight. When she arrived the next day, he boiled a pot of water and put another stone in the pot of water. He took the stone from the freezer and placed it in her hand. “This is BLUE, ” he said. Then he took the stone from the boiling water and, after letting it cool off just a bit, placed it in her hand and said, “This is RED.”
I can’t remember the movie, but it obviously had an impact on me. Anyone know the movie I’m talking about?

EDIT: I think the guy may have also had a room temperature stone that he identified as “GREEN.” Not sure about this part, though…

[jimhart]

A "mixed color" is just a color which hasn't been named. Purple is a mixed color (and is described as such in the video) of blue and read. it's opposite is a mixed yellowish green. A common name for yellowish green is chartreuse. So what if Rita said the color was "pure purple" and Sid said the color was "pure chartreuse"?

[thesoundsmith]

Just look at the opening screen before starting the video. The YouTube button is MY definition of "Red" while his screen is red shifted toward yellow/orange. Do we make Pantone®19-1664 TCX the standard? or 32-C? Or just ff0000? More shades than grey...🙃

[Juan-oshs]

The fly in this ointment: color blindness.
My relative is color blind to red hues, I was surprised when I was told this. The first question I had was, how do you know to stop at a red light, their answer was when the top lights bright I Stop.