This reminds me about the story where Feynman is being interviewed by a psychologist. He answers each question in a way that is both perfectly reasonable yet would cause the psychologist to become increasingly concerned.
That story was in "Surely you are Joking Mr. Feynman".
Thanks. I was looking for a "search in book"-type link but couldn't find it. There are some excerpts on e2 that I found, but not of the passage that I was thinking of.