[Harry!]

Originally Posted by kizzy

oh...so it means even if you cant see something it does not mean it is not real,once you conceptualize something it makes it real?

Yes sort of. It basically challenges the belief that you can visualise something via reason alone and a need of experienced the colour first.

But of course like many theories they have a counter-argument such as it doesn't explain how we get are general concept of blue in the first place. 1+1=2 sort of thing.