That seems to be the challenge: If you train an AI model on all of the art Van Gogh could have observed, but not any of Van Gogh's own images, would it come up

That seems to be the challenge: If you train an AI model on all of the art Van Gogh could have observed, but not any of Van Gogh's own images, would it come up with anything like "Starry Night?" There's a gap between what comes before and what comes after, and it's not totally clear than an AI model trained on what comes before can cross that gap in a way that a human can. Maybe? I don't think it's an "of course" thing, though. I think of it this way: an AI model trained on existing images has billions of images to draw upon, more than a human does. But a human has some subset of those billions of images and their lived experiences, too. That is, as I stand at my desk typing these words, I see out a window where the bushes in front of my house are overgrown and need trimmed back, but the blooming trees across the street are visible through the bushes and providing splashes of color in a tangle of leaves that look nice to me. The branches of the post oak in my front yard reach out toward the street, and are suffused with dark green while the trees across the street are more medium green and yellow. As I walk around the neighborhood later, I'll see much, much more sensory input than even billions of static images supply. Artists in the past were often constrained by the choice of medium, and things like having to mix chemicals to produce new paint colors dictated the palettes with which they could paint. Those artificial restrictions affected things in ways that might or might not be clear to a trained AI model. Perhaps you tag the year of each image in the model training corpus so that it could, in theory, have some sense of progression, but would it choose to consider that feature? If you then asked for a painting as of 1880, could it make enough sense of that to avoid colors and techniques developed after that time, or at least techniques that built on techniques developed after that time? It's possible the future will involve more carefully trained models rather than the "everything all at once" models the current generation of models is using, but... I'm not sure. In any case, I think the poster to whom you're replying is suggesting that someone like Van Gogh isn't just creating "more like what already exists," but that sometimes they are introducing something entirely new, at least new to the art world, perhaps drawn from life, or a fever dream, or strong drink.