Logic / Unit 6 Logic 278 short lesson, about 20 seconds
Definite Descriptions
Captions available
The idea
"The F is G" unpacks as three claims: an F exists, at most one F exists, and it is G.
In practice
"The county auditor signed": someone audits, no one else audits, that one signed.
Where people slip
Russell's analysis. When nothing fits the description — "the present king of France" — the whole statement is false, not meaningless.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
Unlocks
- Nothing yet depends on this.
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