Earlier quoted context omitted.
Unfortunately the humanities succumbed to postmodernism long ago. Since then it has been impossible to impose strict tests on veracity as you find in hard sciences.
What do you mean?
Going further there are a number of works meant to probe the exact limit of what we're willing to consider art. I recall a couple interesting ones:
1. An artist took a shit in a can and sealed it up: https://en.wikipedia.org/wiki/Artist%27s_Shit
2. I recall there was an artist who took an existing book and changed the author name to their own, I can't find a link right now though.