“I think in general it’s like life is tricky because it happens once and there’s no opportunity for A/B testing. It could be that you are living your best possible life and that if you re-play Felix Salmon’s life hundreds of other times, that this life you’re living is the best or among the top 5 percent of lives that you would have lived, and in lots of other ones you’d end up in an alley or in an unhappy relationship or with a job where you’re not intellectually fulfilled, and that you have found this amazing path. It’s also possible that you’re not even in the top 50 percent of lives and that your life is really tragic and that despite all the wonderful and impressive and amazing things you’ve done, that you had the potential to do all these incredible other things that would have been either bigger in scale or more fulfilling or more modest and simple, but more pleasurable or whatever. That there were all these other paths that would be better. It’s, I think, hard to say whether there is something I missed that would have made things much better. In general, I’m pretty happy, and all these imagined alternate lives, I wouldn’t know how to even begin to speculate on how they’d compare.”