Phuctifyno said:
Something that takes time, skill, and effort.
How much of each? Is an incredibly detailed caricature that takes a minute art? Or a rubbish drawing that took an hour? Is it considered greater or lesser art if it took hours of welding, sawing, sanding and chisseling, or if it was made with a simple brush and watercolour paint on a piece of paper? How can you quantify it? If I sing acapella, is it any less of a song than if I had a band accompany?
When I was a kid, my class went on a school trip to an art gallery (Centre Pompidou, Paris). I was looking at a picture that consisted of an entirely white canvas approx. A3 in size. All it had on it was three black dots, in a rough line starting at the centre and heading towards the upper left corner. It looked to me like someone had flicked a cartridge pen and those three small blots were the result of the ink flying from the nib.
That picture had a price tag of 15000 francs (£1,500 at the time) and I couldn't for the life of me understand why. I asked my teacher why it might be, that something which took so little skill to create could be so valued. He told me it wasn't what we saw or how hard it was to create but the thinking of the artist behind it, what it represented and/or the thoughts/feelings it evoked in the viewer that mattered.
It took me years before I understood what he'd been trying to tell me. I discovered in my early 20s that I loved going to galleries where before I would have never considered it. I'm not an artist but I gained the understanding to look and try to see what an artist is attempting.
I'm not by any means saying this is a magnificent showpiece or in the same category as Michaelangelo's amazing sculptures or Monet's oil paintings. But that black box does showcase an idea. He's got us talking about it on this forum, discussing its merits, discussing the issue of piracy, discussing how a small box can hold a $5mill value. While it may have been easy to create and looks a little plain and boring (though I suspect that's intentional), he's the first to present this idea in that way, and he has succeeded. That's why it's art.