Self-contradiction or self-contradictory can refer to:
Auto-antonym, a word with multiple meanings of which one is the reverse of another Oxymoron, a figure of speech that juxtaposes concepts with opposing meanings within a word or phrase that creates an ostensible self-contradiction Paradox, a logically self-contradictory statement or a statement that runs contrary to one's expectation Self-refuting idea or reductio ad absurdum, idea or statement whose falsehood is a logical consequence of the original
See also Contradiction