That is the arguement Ebert made though. Compare good art in one medium to bad art in another. When the second doesn't compare favourably decide the entire medium isn't art.
Well, no. He didn't. His argument was that,
as a medium, games don't qualify as art. My other post in this thread made a couple similar arguments which I've never actually seen addressed.
The problem was that people didn't actually address his arguments about that. I'll let him explain the more common response;
If I didn't admire a game, I would be told I played the wrong one. Consider what happened when I responded to the urging of a reader and watched Kellee Santiago's TED talk. It would finally convince me, I was promised, of the art of video games. I watched it. But noooo. Readers told me I had viewed the wrong talk about the wrong games. Besides, arguing with a You Tube video was pointless if I had never played a game.
See now, this is the problem. If I make an argument that, say, science fiction books
by definition can't contain elves - and that if they do they are fantasy - no amount of examples are going to convince me otherwise. You have to instead engage with the argument itself and make a case for how an elf can exist in a science fictional environment. You have to explore the definition of science fiction and show that a sensible definition can include elves.
Then you go to the examples of books that fit such a definition.
Listing fantastic games without first exploring what art is and how a game may match that definition is pretty futile. I mean, I love Portal, but I don't really see how I could call it art. I don't have a workable definition of art which it fits.
I was considering this as a question of value rather than quality.
See, this is another category error. Hell, Ebert mentions a game he played and enjoyed and I don't see him saying they have no value. The guy reviews summer blockbusters next to art films without making value judgments based on their artistic merit.