Her parents' attitude only 'confirmed' [='strengthened, reinforced'] her resolve to get her own apartment.
The award 'confirmed' her status as one of the great movie actresses.
She was 'confirmed in' her determination to get a higher-paying job.
(..) - Well... - Hmm? Well, as I said, I'm still... collating, actually. But, uh, I have confirmed that he's got an outer layer of protein polysaccharides. He has a funny habit of shedding his cells... and replacing them with... polarized silicon... (..)1979 Alien