Definitions
A necessary condition of a statement must be satisfied for the statement to be true. In formal terms, a statement N is a necessary condition of a statement S if S implies N (S N).
A sufficient condition is one that, if satisfied, assures the statement's truth. In formal terms, a statement S is a sufficient condition of a statement N if S implies N (S N).
| S | N | S N |
|---|---|---|
| T | T | T |
| T | F | F |
| F | T | T |
| F | F | T |
Read more about this topic: Necessity And Sufficiency
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