What to do with reasoning gaps

Shrilaraune

Hey there fam,
So I was just doing some NA drills when a question struck me. In LR generally, we're looking for the assumption or flaw, and then want to set about our assigned tasks based on what we find. More specifically the flaw in the argument (between the premises and the conclusion). Does this mean then that when we notice an assumption in between the premises (which we are supposed to take for granted) that we just ignore said assumption or integrate said assumption into the group of things we take for granted?

Stated differently, can we think of any scenario wherein that assumption between the premises is something we need to account for, strengthen, weaken ect?

Thanks!