I've never been entirely sure about the whole "it should all add up to normality" thing in regards to MWI. Like, in particular, I worry about the notion of intrusive thoughts. A good 30% of the time I ride the subway I have some sort of weak intrusive thought about jumping in front of the train (I hope it goes without saying that I am very much not suicidal). And since accepting MWI as being reasonably likely to be true, I've worried that just having these intrusive thoughts might increase the measure of those worlds where the intrusive thoughts become reality. And then I worry that having that thought will even further increase the measure of such worlds. And then I worry...well, then it usually tapers off, because I'm pretty good at controlling runaway thought processes. But my point is...I didn't have these kinds of thoughts before I learned about MWI, and that sort of seems like a real difference. How does it all add up to normality, exactly?