Logic / Unit 3 Logic 073 short lesson, about 20 seconds
Quantity
Captions available
The idea
Quantity is whether a statement covers the whole subject class (universal: A, E) or part (particular: I, O).
In practice
"All" and "no" are universal; "some" is particular.
Where people slip
"No S are P" is universal — it says something about every S, namely that it's outside P.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
Unlocks
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