My mental model for them is plinko boards. Your prompt changes the spacing between the nails to increase the probability in certain directions as your chip falls down.
i think probably once you start seeing that the behavior falls right out of the geometry, you just start looking at stuff like that. still funny though.
I was half asleep when I wrote it the first time and knew it wasn’t what I wanted to say but couldn’t remember what analogy I was looking for.