Sufficient And Necessary Conditions Flashcards
Only Where
Necessary Condition
Each
Sufficient Condition
Only
Necessary Condition
If But Only If
Each variable is both a sufficient and a necessary condition. Diagrammed with a double arrow
Wherever
Sufficient Condition
Only v. The Only
“Only” introduces a necessary condition, “the only” introduces a sufficient condition
Whenever
Sufficient Condition
When
Sufficient condition
Only when
Necessary condition
“No” Statements… “No X’s are Y’s”
Pick a variable and make it the sufficient condition. then negate the other variable and make it the necessary condition
If
Sufficient condition
Without
Necessary condition. Negate the other part of the sentence and make it the sufficient condition
Every
Sufficient condition
People who
Sufficient condition
Either/Or… “Either X or Y”
Pick a variable and make it the necessary condition. Negate the other variable and make it sufficient condition