Logic / Unit 3 Logic 069 short lesson, about 20 seconds
A Statements
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The idea
A statements — All S are P — assert that the whole subject class is inside the predicate class.
In practice
"All whales are mammals." No whale escapes.
Where people slip
It asserts inclusion, not existence. Whether there are any S is a separate, surprisingly loaded question.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
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