It means clean slate. It’s a phrase I’ve long been aware of, since I read in in Imajica long long ago, which is likely how it ended up in this list. I was going to use caveat emptor, but that one doesn’t invoke the same level of feeling Tabula Rasa does. The phrase in the novel was the name of a cabal of humans who were on a mission to purge the world of magic and mystical things after a…