I just came across this in Shturman and Tiktin’s delightful anthology of Soviet era jokes. (I don't know if it exists in translation.)
Question: What is philosophy?
Answer: It’s a hunt for a black cat in a dark room. Marxist philosophy is distinguished by the fact that there is no cat in the room, and Marxist-Leninist by the fact that one of the hunters in fact yells that he caught the cat.
I wonder what other philosophies it can be applied to.