A barber who is also a philosopher walks into a bar and says, "I'm not a barber." The bartender replies, "You're a philosopher, not a barber." The barber says, "But I'm also a barber." The bartender says, "No, you're not." This is the paradox that will keep you up all night.
Read more about the Barber Paradox
A sentence that reads, "This sentence is false." If it is true, then it is false. If it is false, then it is true. This is the paradox that will drive you to the brink of insanity.
Unravel the threads of the Liar Paradox
A man who kills his own grandfather before he was born. If the grandfather dies before he is born, then how is the man born? This is the paradox that will make you question the fabric of time itself.
Explore the Grandfather Paradox
Or simply, Submit your own Paradox