It's like the early demo for DALL-E where you could get "an armchair in the shape of an avocado", which presumably wasn't in the training set, but enough was in

It's like the early demo for DALL-E where you could get "an armchair in the shape of an avocado", which presumably wasn't in the training set, but enough was in it to generalize the "armchair" and "avocado" concepts and combine them.