premise: We were supposed to leave for Harvard Square ( a place we often go to hang out ) at 4:00 pm , but it was thundering out and raining , So I asked if it were possible to catch the next bus there ( which was at 5:10 pm ) because I ' m afraid of thunder & lightning . He does the " fine . " thing , clearly annoyed that I wanted to go later . Why do we often hang out at Harvard Square ?
hypothesis: Because we were supposed to leave .