The only bit of logic-based public bathroom humor I know is: the difference between men and women is that between the statement [P and not Q] and the statement [Q and not P].
![The only bit of logic-based public bathroom humor I know is: the difference between men and women is that between the statement [P and not Q] and the statement [Q and not P].](http://cdn.quoteddaily.com/images/john-allen-paulos/the-only-bit-of-logic-based-public-bathroom-humor-i-know-is-the-difference-between-men-and-women-is-that.jpg)
The only bit of logic-based public bathroom humor I know is: the difference between men and women is that between the statement [P and not Q] and the statement [Q and not P].