The Blogic

Adventures in recreational logic

Sometimes I want to do logic-related things that aren’t really appropriate for publication - typically because they’re spuriously or completely unjustified. That’s the focus of this blog.

11 March 2023
Rotational Logic

FP Ramsey makes the following observation in the 1927 “Symposium: Facts and Propositions”: We might, for instance, express negation not by inserting a word “not,” but by writing what we negate upside down.