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Necessity and sufficiency

In logic and mathematics, necessity and sufficiency are concepts used to denote a conditional or implicational relationship between two statements. For example, in the conditional statement: "If P then Q", Q is necessary for P, because the truth of Q is "necessarily" guaranteed by the truth of P. (Equivalently, it is impossible to have P without Q, or…

Relationship between necessity and sufficiency, Necessity & Simultaneous necessity and sufficiency

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Relationship between necessity and sufficiency

MammalReal numberFourth of JulyIndependence DayUnited States
12 related topics

Necessity

ContrapositionImpliesPredicatesAlgebraSet
9 related topics

Simultaneous necessity and sufficiency

Graph theoryBipartiteCyclesIntensionExtension
6 related topics

Sufficiency

VetoOverridePlaying cardDisjunction
4 related topics

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Overview

Definitions

Necessity

Sufficiency

Relationship between necessity and sufficiency

Simultaneous necessity and sufficiency

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Necessity and sufficiency

Nodes54
Edges53
Triples3
Avg. degree1.96
Density0.037037
Components1

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Necessity and sufficiency

Top relations

see also · 3
Necessity and sufficiency → Affirming, Closed, Principle

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Important terminology

necessary sufficient condition true one conditions necessity sufficiency statement conditional example statements also equivalent displaystyle implies may concepts several must

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Necessity and sufficiencysee alsoAffirming0.60section
Necessity and sufficiencysee alsoClosed0.60section
Necessity and sufficiencysee alsoPrinciple0.60section

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