In their attempt to express how important philosophical ideas relate to jokes, Thomas Cathcart and Daniel Klein are largely successful. Indeed, their hypothesis that there is a relationship between the philosophical and the joking mentality ends up seeming like a plausible one, as jokes are used to illustrate issues in metaphysics, logic, epistemology, ethics, the philosophy of religion, existentialism, the philosophy of language, social and political philosophy, relativity, and meta-philosophy.
Some of the jokes in Plato and a Platypus Walk into a Bar: Understanding Philosophy Through Jokes do feel a touch dated – with a strong emphasis on somewhat off-colour jokes based around traditional attitudes towards sexuality. Still, the book is a fun, quick read and worth a look if you are looking for some light-hearted yet academic contemplation.