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1 Definition
Clear, logical, and convincing; presented in a way that compels belief or agreement through the strength of its reasoning.
2 In Use
Her cogent argument left the board with no real grounds to reject the proposal.
3 Word Origin
cogere Lat. · to drive together → cogens Lat. · compelling, urging → cogent 17th c. English
Cogent traces back to the Latin verb cogere, meaning to drive together or force into one place, itself a fusion of com (together) and agere (to drive). From this came cogens, the present participle describing something that compels or urges. By the seventeenth century, English writers had adopted cogent to describe not physical force but the intellectual force of a well built argument, one that drives the mind toward a single, unavoidable conclusion.
💡Fun Fact
Cogent shares its Latin root with agenda and agent, all descending from agere, to drive or do. That shared ancestry explains why a cogent argument feels almost physically propelling, as if it is literally driving you toward agreement. Logicians and debate coaches still treat cogency as a technical standard, distinct from mere validity: an argument can be logically valid yet weak, but a cogent one must also rest on premises that are actually true and relevant. Lawyers, editors, and philosophy professors reach for the word constantly because few others capture that precise blend of clarity and persuasive force.
