If you're used to being warm, then I could see 71 with some air flow and no/very thin clothing being enough to trigger a shiver. With my office set to 70, a fan

If you're used to being warm, then I could see 71 with some air flow and no/very thin clothing being enough to trigger a shiver. With my office set to 70, a fan on my bare legs can be too chilly sometimes. I hate heat and sweat a lot in summer, so I'm not opposed to cold either.