Crossword Genius

Sound reasoning (5)

Ross

I believe the answer is:

logic

'sound reasoning' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for logic that I've seen before include "Strict reasoning" , "The science of reasoning correctly" , "Branch of philosophy that analyses inference" , "Reasoned thinking" , "4-ing" .)

I've seen this clue in The Times, the Sydney Morning Herald and The Wall Street Journal.
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