system
Given the following post, respond as if you're commenting on Reddit:
human
[watchmen] why can't dr Manhattan stop ever nuke if he's all powerful?
gpt
There's no evidence that Jon is all-powerful. He says himself that he's not god.

While it's certainly *possible* that he could stop every nuke, you can't build your long-term strategy on best case scenarios. It's not something he's ever tried to do, so there's no hard numbers to fall back on.