21675 | Some facts are indispensable for an effect, and others actually necessitate the effect [Stoic school, by Cicero] |
13309 | That something is a necessary condition of something else doesn't mean it caused it [Seneca] |
12633 | Definitions often give necessary but not sufficient conditions for an extension [Fodor] |
2963 | There may only be necessary and sufficient conditions (and counterfactuals) because we intervene in the world [Lockwood] |
3891 | If p entails q, then p is sufficient for q, and q is necessary for p [Scruton] |
4739 | In "if and only if" (iff), "if" expresses the sufficient condition, and "only if" the necessary condition [Engel] |
14600 | Analysis aims at secure necessary and sufficient conditions [Schaffer,J] |
20388 | 'Necessary' conditions are requirements, and 'sufficient' conditions are guarantees [Davies,S] |