@zuzu - or when the Nazi's ask "Ver are the Jews?" in "The Hiding Place" and frightened Betsy says, "Under the floor!" That is indeed where they were, but the SS Officers slaps her around for lying and tear up everything in the house looking for them - *except* the floor.
Captain Kirk: Everything Harry tells you is a lie. Remember that. Everything Harry tells you is a lie.
Harcourt Fenton Mudd: Now listen to this carefully, Norman. I am... lying.
Norman: You say you are lying, but if everything you say is a lie, then you are telling the truth, but you cannot tell the truth because everything you say is a lie, but you lie... You tell the truth but you cannot for you lie... illogical! Illogical!