Impossibility
Appearance
![]() | The present page holds the title of a primary topic, and an article needs to be written about it. It is believed to qualify as a broad-concept article. It may be written directly at this page or drafted elsewhere and then moved to this title. Related titles should be described in Impossibility, while unrelated titles should be moved to Impossibility (disambiguation). | ![]() |
![](http://upload.wikimedia.org/wikipedia/commons/thumb/9/99/Wiktionary-logo-en-v2.svg/40px-Wiktionary-logo-en-v2.svg.png)
Look up impossibility in Wiktionary, the free dictionary.
Impossibility may refer to:
Philosophy and logic
[edit]- 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
[edit]- 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