"I am never wrong about anything, and all the pains I have taken to verify my notions have only wasted my time."

I’m no G.B. Shaw, as my previous post makes plain.* But since it turned into a version of Humiliation, I say we all should play. What lesson drilled into your head by someone you trusted later turned out to be hilariously misguided? I can start the festivities again by pointing you to an account of the undergraduate honors seminar in which I learned to never trust the Jews.

*The quotation is from a letter to H.G. Wells in which Shaw chided him for being too sanguine about the future of Stalinist Russia.