21/21 (on mobile) But I spent a few years in an art atelier and I'm also familiar with digital art and photography. I also scan fine art for a living.

The blue in the Degas ballerina painting was a dead giveaway.

The JFK portrait was easy if you're familiar with how film photography looks -- the grain just has a certain look to it.

The background in the sumi scroll made no sense.

Photos made me think a bit longer, but the composition (and hands, of course) gave away the AI images. The volcano photo, for instance -- the human captured one has more depth in both the scene and subject (caldera in the foreground, mountain in the distance with more layers of atmosphere). Boring flat composition with no real focal point or visual narrative gave away the bot images.