Gary is sure, because he remembers his last talk with Torin and he seems like a smart, understanding older guy who would be willing to help a Tribute out in his time of need. The cranky look is probably just some form of resting bitch face. Totally not his fault.

"Yeah, you! Uh--" Gary snaps his fingers a few times to conjure the name. It was a while ago, by his terms. "--Torin! Yeah. I'm doing this stuff with, uh...parabolas? You know anything about parabolas?"