Posted: Feb 26, 2016 4:46 pm
DavidMcC wrote:romansh wrote:Yes, yes I get it. The concepts of morality and ethics exist.
But then so does the concept of red. Whereas, red itself is a little more difficult to believe if we start thinking about physics and biochemistry associated with the experience of red.
...
You do not have to study or think about "red" to see it, therefore, "red" is not a concept (unless you are talking of linguistics rather than sensory biology).
EDIT: I apologise to the rest of the forum (except romansh) for this off-topic conversation about colour perception, but I was not the one to start it.
You don't have to believe in "red", because, whatever Oldskeptic may say, you only have to see red, not believe in it as a concept. Why he thinks the "physics and biochemistry associated with the experience of red" make it doubtful as a "concept" is beyond me. True, it is complicated, such that colour optical illusions are possible, but that does not mean there is no such thing as red as a component of many percepts, unless, of course you are a protanope, with a visual system that is insensitive to red wavelengths : http://www.colourblindawareness.org/colour-blindness/types-of-colour-blindness/
Protanopia
Protanopes are more likely to confuse:-
1. Black with many shades of red
2. Dark brown with dark green, dark orange and dark red
2. Some blues with some reds, purples and dark pinks
3. Mid-greens with some oranges