She argued 'convincingly' [='persuasively'] that more money should be given to public schools.
There is no 'convincing' evidence to support his theory.
Your argument/story isn't very 'convincing'.
(..) (SHEPHERD HUMMING) - (ARGUING INAUDIBLE) - (HUMMING CONTINUES) All right, Peter, he can live with us until he gets back on his feet. You made a full and convincing case. Ya... ...ay, you can live with us! Wow, that's great news. (PHONE CHIMES) Uh, what's your, um, ferret policy? (..)2020 TvShow: Family Guy Title: Movin' In (Principal Shepherd's Song) Season: 18 Episode 20