system
Given the following post, respond as if you're commenting on Reddit:
human
Why is there more matter than antimatter?
gpt
We don't know.

This question, often referred to as the "baryon asymmetry problem", is one of the major open questions in elementary physics.

It's natural to assume that matter and antimatter would've been created in equal quantities in the big bang, but the fact that there seems to be a very large imbalance implies that some physical laws apply differently to matter than they do to antimatter. For now, it's an open problem and no complete answer to the baryon asymmetry  problem has been found.

So the solution to this problem is left as an exercise to the reader.