JonasS wrote:Chap wrote:JonasS wrote: ....what is a colour?
I gather from the way you write in this and your similar questions "what is a photon?" and "what is blue" that what you claim to be looking for here is an answer that will define the entities referred to in some ultimate way by giving a definition of their essence, an answer about whose meaning there can be no further question. You will not get such answers from modern science, which (unlike some of its predecessors) does not attempt that kind of thing.
Your other attempts to say that in effect anything can mean anything make me think of what Wittgenstein said at the end of the Tractatus Logico-Philosophicus : "Whereof one cannot speak, thereof one must be silent".
Good advice there.
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No, I asked what a Photon was for a different reason to that of asking what a colour is!
I really wanted to know if you actually knew what a Photon is.
Whereas I asked what a colour is to point out that when you really think about it, it begins to become meaningless.
I was teaching people about photons before you were born.
Color is not a meaningless concept to anyone who is prepared to engage in discussion at a level higher than word games.