system
Given the following post, respond as if you're commenting on Reddit:
human
Why didn't Dr Manhattan cure his ex-girlfriends cancer? [Watchmen]
gpt
For the same reason he didn't stop the Comedian from shooting that woman in Vietnam. The Comedian would say it's because he's "out of touch" with humanity and it doesn't even occur to him. Dr. Manhattan, given that he can see his own past and future, might say that he didn't do it because he doesn't do it -- time is self-consistent, and his motivations aren't really relevant.