Posted: Aug 10, 2017 10:16 am
by DavidMcC
romansh wrote:
GrahamH wrote:
romansh wrote:
GrahamH wrote:I think I'm with SoS on this. 'physical colour', the physics of light and bus and visual system is a reliable discriminator of colour. The 'my red is like your red' spook inner mental world stuff is probably illusion. The bus isn't an illusion.

Well I agree our perception of 'colour' is a reasonable discriminator of colour (or at least photon wavelengths) . That was never an issue.

Sorry, I'm lost. I don't know what you are asking.

In this post I was not asking anything. Just agreeing that our vision has a reasonable colour discrimination. And also pointing out this was never an issue at least not for this thread.

So this whole thing started when I claimed, much as the gentleman in your video, that colour was an illusion.

Ah, so some video is to blame for your confusion, is it?
If your "inner mental world" is to be dismissed as "spooky", how do you think we evolved a sense of colour discrimination? Therefore, I would question the validity of the video, without even having seen it. Can you give a link, so that I can comment more definitively?
The thing about illusions is that they mislead the viewer, by definition. Colour vision of natural objects in natural lighting can only mislead about details. Seriously strange coour illusions are only caused by high tech displays, ultimately because we did not evolve watching TV screens.