premise: Although there were no fewer than three different public Harry Potter parties here in town last night , I did n't go to any of them . Some small children needed to be in bed by then , and besides , my copy was sitting safely at the public library , ready for me to pick it up this morning . I set my alarm clock for 7:30 , planning to get up , have breakfast , and be at the library at 8:30 when they opened . Well , I turned the alarm clock off and fell back asleep until 8:20 . What may have been your reason for not going to the Harry Potter parties ?
hypothesis: They were too late .