Logic / Unit 2 Logic 057 short lesson, about 20 seconds
Circular Definitions
Captions available
The idea
A definition is circular when the definiens leans on the definiendum.
In practice
"A logician is a person who does logic." Useless to anyone who lacked "logic" going in.
Where people slip
Circles can be wide — two definitions defining each other fail the same way, just less visibly.
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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