necessary conditions
Must-haves for outcome
Necessary conditions are requirements that must be met for something to occur or be true, though meeting them doesn't guarantee the outcome.
Oxygen is a necessary condition for fire, but oxygen alone won't start one.
The concept appears in logic, law, and everyday reasoning: A valid passport is a necessary condition for international travel.
Contrast with sufficient conditions, which guarantee an outcome when present.
- prerequisitesNecessary prior conditions
- requirementsNecessary conditions for something
- preconditionsRequirements that must precede
- entry requirementsQualifications for acceptance
- essentialsIndispensable items or elements
bare minimum · presuppositions · ground rules · key · proviso · base · stipulation · deal breakers · entailment · if and only if · constraints · sine qua non · criteria · axioms · first principles · dependency · must-have · fundamental
- conditionsweather, climate, health, wellness, fitness
- semanticsmeaning, denotation, sense, connotation, reference
- optimal controlfeedback control, controllability, Lagrange multipliers, horizon, constraints
- variational calculusgeodesic, geodesics, catenary, natural boundary, critical point
- conceptscategorization, typicality, abstraction, generalization, family resemblance
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