logical necessity
Cannot be otherwise
Logical necessity describes something that must be true by virtue of logic itself—its denial would be self-contradictory.
If all mammals are warm-blooded and dogs are mammals, then dogs being warm-blooded is a logical necessity.
The term distinguishes what's logically unavoidable from what's merely probable, customary, or physically required: Given the premises, the conclusion follows by logical necessity.
- determinismDoctrine of causal necessity
- inferenceConclusion reached through reasoning
- causalityCause-effect connection
- certaintyTotal absence of doubt
- validityQuality of being sound
inevitability · counterfactuals · by definition · tautology · therefore · existence · axioms · syllogism · follows · essence · implication · truth · rigorous · must · binding · undeniable · proof · inescapable
logical necessitystatistical probability
Quantified likelihood of occurrence
conjecture · probability · likelihood · speculation · hypothesis
logical necessitycontingency
Uncertain possible event
indeterminacy · randomness · chance · accident · happenstance