"Not everything is set in stone. I mean, yeah, there are events that can't be avoided, no matter how much you might want to, but there's so many little things that can all add up. Change the right thing, and the whole universe changes," Bart says, frowning. "I really don't think the Fates pay attention to whether I had choco-puffs or fruity flakes for breakfast this morning, but even something like that could have an impact."