A Burning Question

When Chanukah time comes around, I am always reminded of the Beis Yosef’s famous question: Why did the Sages institute eight days of Chanukah to commemorate the miracle that the oil lasted for eight days? After all, the miracle was in actuality only for seven days; they had enough oil for one day.
Of course, it would seem rather awkward if Chanukah were seven days. A morah would try to explain to her students, “The oil lasted for eight days, so we celebrate Chanukah for seven.” Be that as it may, a sefer called Ner L’Meiah was composed with 100 different answers to the Beis Yosef’s question. The author must have really been on fire to come up with so many answers. But that sefer doesn’t hold a candle to Nes LaShoshanim, which has 250 answers. However, even that is no match for a recently published sefer with 500 answers.
It seems to me that some answers are beyond the pale. For example, we know that in the Diaspora we celebrate two days yom tov for the shalosh regalim, because of s’feika d’yoma. Back in the day, messengers were not always able to reach various cities outside Israel in time to let them know what day had been declared rosh chodesh. So when Pesach rolled around, residents of those cities weren’t sure which day was actually Pesach. Due to the doubt, they always kept two days of yom tov.