Re: OOC Discussions
I think you're playing it perfectly for Fost. Not everyone's a scholar, and what might be "common knowledge" in one place (the Circle) may be completely foreign in another (farming or fishing village).
That said, Fost probably knows the basics of many things -- Dalish are tattooed tribal elves who stay away from civilization (maybe even described as savages), and Blood Mages are horrible, scary monsters...he may even have been told that all Tevinters are blood mages, and scary.
That said, feel free to play him as knowledgeable or ignorant as you desire about "foreign" things...even stuff dealing with Fereldan nobility can be foreign to a commoner. You know your arl, and you know the king, but the structure of the bannorn and arlings may be baffling.