Relevant here, anyone interested in combinatory logic (functional programming, etc.) should check out To Mock a Mockingbird. It’s a lovely puzzle book which tea

Relevant here, anyone interested in combinatory logic (functional programming, etc.) should check out To Mock a Mockingbird. It’s a lovely puzzle book which teaches the subject through direct experience. Folks also might enjoy The Magic Garden of George B. (And of course, all of Smullyan’s other books.)