No, it's not that hard. [ Just... strange, addressing Pike by his first name. Wait, Chris. Chris. Oh good, his stomach's doing that weird nervous flip again. ] Burnham?

[ He doesn't quite recognize the name. Maybe he wouldn't, maybe whoever it is doesn't exist in his universe, or isn't as relevant. Either way, Jim is curious. Just like he is curious about everything that Pike Chris shares about this other mirror universe. It's such a surreal story, if something almost similarly weird hadn't happened to him he might have had his doubts about its veracity. ]

Can't imagine it was that easy. My reality, ah... came to be when Ambassador Spock traveled back in his timeline, to the day I was born-- triggering a chain of events that would lead to a divergence from his original timeline, thus creating an alternate reality.

He never managed to travel back to his own point in time, though... I'm not sure he even wanted to.