Impossibility

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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

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