Then you could use mechanical turk to have them rate each image to figure out how close it is to a Unicorn...
I appreciate all the comments around determinism, sampling, scientific method, but as I said when I posted this just after building, it really is just for fun and to see, over time, if the general mish mash of outputs become more refined without any changes to the prompt (which doesn't aid it through CoT/ToT or improving on previous attempts etc.)