A woman on the F train turns to the man next to her.
"Excuse me," she says, "but are you Jewish?"
"No," replies the man.
A few minutes later the woman turns again.
"Im sorry, but are you sure you're not Jewish?"
A few more minutes go by.
"Are you absolutely sure you're not Jewish?"
"OK, fine. You win. Yes, I'm Jewish."
"It's funny," she says." You don't look Jewish."
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