Briefing is a great idea but it can't cover the unexpected.
Das, I don't have the ops manual here, what does your precious one say ?
And I don't have contempt for FOs at all, or cadets. I just think that some very inexperienced FO's don't have the time in the seat to get the big picture. This can for instance mean they take 'ops manual' quotations as absolute and finite. The real world is different, and the PIC is there to ensure the ultimate safety.
Relax, we are on the same team.