adjective

capable of causing someone to believe that something is true or real.

there is no convincing evidence that advertising influences total alcohol consumption

cogent,persuasive,powerful,potent,strong,forceful,compelling,irresistible,telling,conclusive,incontrovertible,unanswerable,incontestable,unassailable,sound,well founded,plausible,credible,believable,carrying conviction,likely,probable,suasive,assuasive,verisimilar,colourable