JK Rowling must have known what she was getting herself into when she introduced a world dictated by magical artifacts and infinitely powerful spells: There was no way to end Harry Potter without conveniently forgetting a few things. Like, for example, that Hermoine has a time-turner that allows her to go back in time and stop tragic things from happening after they occur. Why she doesn't use it more often, it's hard to say; let's call it, "The Great Heroes Overlook." So now that Pottermania is in the process of subsiding, a few superfans have taken the time to analyze where the internal book logic falls apart, and what could have ended the series on a note more consistent with how Harry Potter was constructed. Be warned: There are plenty of spoilers, but disguised ones, and at least one more uncomfortable shot of Voldemort as a fetus.