co·gen·cy /ˈkoʤən(t)si/
力量,肯切,中肯
Co·gen·cy n. The quality of being cogent; power of compelling conviction; conclusiveness; force.
An antecedent argument of extreme cogency. --J. H. Newman.
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cogency
n 1: persuasive relevance
2: the quality of being logically valid [syn: validity, rigor,
rigour]