truth without certainty seems contradictory
Mrtennis: I might have lots of true beliefs, without being certain of them; e.g., I might make an educated guess about what floor of the garage I parked my car on, and be right. Indeed, there might be any number of true statements nobody has considered, so nobody is certain of them.
The general thought is that certainty is somehow psychological, and truth is not.
It's plausible that knowledge entails certainty (knowledge may be a partly psychological notion). I don't think it does, because I don't think justification requires certainty.
John