“Oxygen is sufficient for fire.”
Usage Entry 1184 / 1350 60-second read
Necessary vs. Sufficient
Required for X versus enough for X.
The comparisoni
“Oxygen is necessary for fire — but not sufficient. You need fuel and heat too.”
The ruleii
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NECESSARY = needed. SUFFICIENT = enough.
A NECESSARY condition must be present for the outcome — absent it, outcome fails. A SUFFICIENT condition, when present, guarantees the outcome — others may work too. Many things are necessary but not sufficient; rare to find both together.
Memory aidiii
Remember it like this
Necessary = required. Sufficient = enough alone.