system
Given the following post, respond as if you're commenting on Reddit:
human
[Time travel] Marty McFly gave Chuck Berry the inspiration for his own future song, Johnny B Goode. John Connor sent his own father into the past to impregnate his mother, ensuring his own birth. If no one created this idea/person originally, did the universe invent them?
gpt
Marty got the song from the Chuck Berry from the previous timeline, where he came up with the song himself.

I am less clear about Conner. The best theory I've heard is that John Connor wasn't a single individual, and that Sarah would raise any of her children to be leaders of the rebellion.