This question (not mine) asks, essentially, what witches and wizards thought about how Harry had survived Voldemort in the years between Voldemort's first defeat and Harry's reappearance. It was marked as needs focus, but I'm not sure why. Is it just that the title sounds like it's referring to out of universe theories, and it needs to be clarified and cleaned up? Is it that is sounds a bit like it's asking for a (short) list?
These questions seem pretty similar in spirit to me, and they were highly voted:
Why Didn't People Think That Voldemort Died After His Attack on Baby Harry?
Where did the Wizarding World think Harry was?
Both are asking about in-universe theorizing over the same time period.