> Off-Topic: Most stories about politics, or crime, or sports, unless they're evidence of some interesting new phenomenon. Videos of pratfalls or disasters, or cute animal pictures. If they'd cover it on TV news, it's probably off-topic.
My opinion is that this place is great for two reasons: It's narrow focus on one topic, and a userbase that consists of experts in that one topic. When Hacker News strays from it's area of expertise I feel that Gell-Mann Amnesia is apparent and the quality of discussion much lower. Again not just for the politics but for other random news as well.
https://news.ycombinator.com/newsguidelines.html
> On-Topic: Anything that good hackers would find interesting. That includes more than hacking and startups. If you had to reduce it to a sentence, the answer might be: anything that gratifies one's intellectual curiosity.