Minsk or Pinsk?
Two rival businessmen meet in the Warsaw train station. "Where are you going?" says the first man.
"To Minsk," says the second.
"To Minsk, eh? What a nerve you have! I know you're telling me you're going to Minsk because you want me to think that you're really going to Pinsk. But it so happens that I know you really are going to Minsk. So why are you lying to me?"