The ancient [[Greek]] Zeno is known for his invention of many paradoxes, the [[Zeno's_paradox|best known]] of which "proves" that a moving object can never reach its destination.
A well known family of paradoxes involve [[self-reference]], such as the statement "this statement is untrue", or the old joke "How do you keep a fool busy? Hand him a card which on each side reads with this question and 'see other side'on both sides". Others involve creative signs (such as one that reads "Keep Left" with an arrow pointing right, or "Reading This Sign Is Forbidden").
[[Category:Philosophy]]
[[Category:Logic]]
[[Category:Dictionary]]