> so I think it actually already encodes our bias and general lack of skill at distinguishing violet from purple. > Similarly many people don't really make a d

> so I think it actually already encodes our bias and general lack of skill at distinguishing violet from purple. > Similarly many people don't really make a distinction for cyan and just call it blue or green when they see it. Isn’t there a difference here between poverty of naming and physiologic limitation? Most people call cyan something else because they don’t have a name for it, but they can be trained to distinguish blue or green and cyan. OTOH, the point here is that certain violets and purples are metamers and although they have different spectra they cannot be physiologically distinguished.