Had a conversation with a guy in my building the other day. He caught a glimpse of the cover of the book I was reading (Why Does E =MC2?) and told me this story of when his son came home for Thanksgiving and said, as an example of what he had learned, that "pi R Square". The guy said, "and I told him, 'no, pie are round!'" And then there was laughter.

I heard this joke, more or less exactly as it was told, about thirty years ago, except not in first person, and regarding a farmer talking to his college-attending son. So now I don't know what to think. Is this guy in the habit of telling old jokes in first person? Does he even have a son? Should I worry that he can't tell the difference between reality and fiction? I'm scared.