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Sound Arguments
“Good structure is not enough; you must also inspect what the structure is built from.”
01 / SUMMARY
In short
A deductive argument is sound when it is valid and every premise is true. Soundness combines two separate checks: logic and the truth of the premises.
03 / SCENE
In the wild
All mammals breathe; whales are mammals; therefore whales breathe. The form is valid and the premises are well established.
04 / LIMIT
The limit
A conclusion that happens to be true does not make faulty reasoning sound.
FINAL NOTE
What remains
Demand both: an inference that works and premises that survive scrutiny.