Bad example. Those who are color blind would actually see things differently.
Irrelevant (we're not talking about situations where impairments are involved).
Some simply can't detect the differece in tonality be it due to lack of training or lack of attention that particular detail or physical inability.
Then how is the difference to be discerned? What's the difference between an effect that can't be detected by one or more of the 5 senses and an effect that doesn't exist?
Again, if it's real, it has to be well-defined and detectable in some manner. If it's neither of those two things, there's no basis for the claim that it's real.
LS
