Impossibility may refer to:
Philosophy and logic Epistemic impossibility, in modal logic a statement that cannot be true, given what we know Subjunctive impossibility, types of statement that cannot be true based on various types of subjunctive modality Logical impossibility, a statement that contains a logical contradiction Impossible world, a concept in philosophical logic
Other uses Impossibility of performance, in contract law an excuse for non-performance of a contract Impossibility defense, a criminal defense for a crime that was legally impossible to commit Proof of impossibility, in mathematics a proof that demonstrates that a particular problem cannot be solved
See also Impossible (disambiguation) Possibility (disambiguation)