"...but I agree with [character known to be a complete idiot]."
Stock phrase when a character who's normally Book Dumb
, The Ditz
or possibly even the The Ditz
comes up with a valuable insight. The character most often heard belittling their intelligence sighs heavily and concedes, "I can't believe I'm saying this, but I agree with him
Also heard when two people of more or less equal intelligence, who normally disagree about everything on ideological grounds, find that there's one opinion they share.
Seen it a million times, but the only example I can think of is one of the De Matteis
Justice League stories: Blue Beetle says "Booster was right!" in one panel and in the next is muttering "'Booster was right'? I can't believe I said that!"
(This is up for grabs, btw.)