cross-posted from: https://lemm.ee/post/4711771
At least some of the signs were desgined by Anders Sandberg:
I found the image on Bruce Sterling's Tumblr.
The source is from u/FuckMyHeart's (reddit user) comment, which has a bit more info:
From the same comment and user:
I similarly thought this was supposed to be a list meant to help you identify when someone is deploying fringe science. But in the context of the community (sciencefiction) and some of the other comments, I've realized that I think it's meant to be sample signs you could use in a story like at a lab where that kind of "science" was being done.