co ‧ gent /ˈkəʊdʒ ə nt $ ˈkoʊ-/ BrE AmE adjective formal
[ Date: 1600-1700 ; Language: Latin ; Origin: present participle of cogere 'to drive together, collect' , from co- ( ⇨ ↑ co- ) + agere 'to drive' ]
if a statement is cogent, it seems reasonable and correct
cogent argument/reason/case etc
a cogent argument for banning the drug
—cogently adverb
—cogency noun [uncountable]