Thanks for the expressions from English, McGrath. All but one new to me.

It is possible to find bad meanings associated with 'white' (whitewash, white death) and good ones associated with 'black' (most examples I have in mind come from German: our conservatives for instance proudly call themselves 'blacks'; 'black gold' could be an English example), but on the balance of it Azizi is right.

The words black and white are used differently in different sciences. What Bobert from the point of view of an art major has said about the black/white difference is quite likely correct in that context but would be the wrong response in psychology of perception. And that the sun is a 'black' body would not count as a correct statement outside of physics.

Wolfgang