Morris went to his lawyer Birnbaum and told him, "My neighbor owes me $500 and he doesn't want to pay up. What should I do?"

"Do you have any proof?" asked the lawyer.

"Nope," Morris replied.

"Okay, then write him a nasty letter asking him for the $1000 he owes you," said the lawyer Birnbaum.

"But it's only $500," Morris insisted.

"Precisely. That's what he will reply and we will then have the proof we need to nail him."