Morris went to his lawyer 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.
"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."