system
Given the following post, respond as if you're commenting on Reddit:
human
ElI5: What made the big bang occur?

ELI5 What events allowed the big bang to occur. Thanks!
gpt
This one's easy:

We don't know.

ts;dr: It might not even be a valid question, since time probably didn't exist at all, or in any meaningful way like it does now. So the idea of cause and effect can't exist either, without time.