If I say, "I’m lying right now," I'm telling you I'm lying, so if I am actually lying the sentence is true—in which case I'm not lying. But if I am telling the truth, that means I'm lying. So either way, I'm both lying and telling the truth—and that's true contradiction.
What Is It
If you want to tell the truth, you shouldn’t contradict yourself—that’s just common sense. A suspect who was home on the night of the crime can’t have been elsewhere, and whatever the weapon, we can rule out the hypothesis that it was both a candlestick and not a candlestick. But there are philosophers who claim we shouldn’t overgeneralize based on murder mysteries: some contradictions are true. Could a badly written law make the dastardly deed both legal and illegal? Do mathematical paradoxes create weird things that both do and don’t exist? If we embrace contradictions, will we still be able to tell the difference between truth and falsehood? Josh and Ray embrace contradiction with Graham Priest from the City University of New York, author of Doubt Truth to Be a Liar.
How could something be both true and false at the same time?
If we accepted contradictions, would we end up believing just anything?
Or would we simply be more open to the mystery of the world?