system
Given the following post, respond as if you're commenting on Reddit:
human
[FOX X-Men] Why do child Jean Grey's parents die in a car crash in the revised timeline, but not in the original timeline?

Presumably some butterfly effect difference from Wolverine and the White House incident. But how?
gpt
you already answered your own question: It was part of the "butterfly effect" (which isn't the proper term to use here, as it is supposed to refer to small changes made by observers, as opposed to deliberately changing events).

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It could just be that the world was suddenly a LOT more stressful because of the public's awareness of mutants, which would rub off on Jean's psyche, activating her powers, but one can't be sure.