This seems like an exercise in scaling laws.
The odds of being a hero who save 100 lives are less 1% of the odds of being a hero who saves 1 life. So in the absence of good data about being a hero who saves 10^100 lives, we should assume that the odds are much, much less than 1/(10^100).
In other words, for certain claims, the size of the claim itself lowers the probability.
More pedestrian example: ISTR your odds of becoming a musician earning over $1 million a year are much, much less than 1% of your odds of becoming a musician who earns over $10,000 a year.
Prediction 1: Hermione will soon harrow Azkaban. Why wouldn’t she? She’s all but immortal, now.
Prediction 2: Time-travel and memory-charm shenanigans incoming. Evidence:
Harry weirdly ignored the missing recognition code on LV’s forged message.
Cedric considered in Harry’s plans, and his Time-Turner mentioned, then seemingly forgotten.
Death-Eaters all dead, but no faces observed.
Flamel asserted dead, but we didn’t see it, and LV explicitly didn’t kill him personally.
Dumbledore thinks in stories, yet we’re supposed to believe he’s surprised when the villain reveals he’s captured the hero and his equipment (Harry and the Cloak), just like villains always catch heroes and take their stuff near the end (see: Frodo Baggins, Luke Skywalker).
Hermione has been asleep the whole time, neither giving nor receiving information.
Questions:
did Harry tell Cedric to do certain things before Harry left? Did Harry tell Cedric to Obliviate Harry afterward so Harry could play his part convincingly? What did Harry most likely tell Cedric to do?
who will do the Time-Turning, Hermione, Cedric, or Harry?
who will be saved? Obvious candidates include Flamel, Dumbledore, Lucius Malfoy, maybe all the anonymous Death-Eaters.
if you were Hermione and had a Time-Turner and the Stone and the Cloak and six hours to save everybody but Voldemort, Quirrell and Macnair, how would you do it? (Do you need the help of someone who can Obliviate well? Do you need partial Transfiguration?)