I'm guessing there is at least one person who espouses the theory "Everything is art." Then you would have to agree that everything is art. But then art loses its utility as terminology. I think you should at least accept that some things are not art. For example, I claim the number 13589999047 is not art, because I just typed it randomly and it has no meaning whatsoever.

Of course 13589999047 is art! It's a incono reactive absurdist challenge to those who would have us destroy the sanctity of art!

... Not quite sure what point exactly I was trying to make, but yes, I made several words up to make it with, and I stand by my point!