Art and a Pineapple

What qualifies as a work of art?

That's not a new question, but rather an ever-present one, at least since around the turn of the 20th century when non-representational, or highly distorted images, came to dominate cutting edge artistic activity and when "found objects" became viewed as equally legitimate to a work that might have taken months to create and only with great skills of one sort or another.

Now comes the celebrated case of the Pineapple, which reopens the question for, one suspects, a lot of younger people who have never previously given the issue much thought.