This is taken from the Forum at the webcomic Questionable Content, but it is actually a paraphrase of a piece that Antony Flew wrote in 1950 called Theology and Falsification.
Anna and Kate are walking down the street when they come to an empty lot.
“Look at that beautiful garden!” cries Anna, “It must be tended by a particularly skillful gardener!”
“What are you talking about?  It’s an empty lot full of weeds!  It couldn’t possibly be tended by a gardener.” is Kate’s reply.
“He must tend it to grow that way.”
“I have never …