There's nothing in the site guidelines that states all content will conform to a narrow definition, in fact this particular post is relevant because the questio

There's nothing in the site guidelines that states all content will conform to a narrow definition, in fact this particular post is relevant because the question and subsequent answers on SE are interesting to engineers and aviation enthusiasts. Here is the relevant section of the guidelines: > 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. By contrast, your entire comment is in violation of the same guidelines: > Please don't submit comments complaining that a submission is inappropriate for the site. If you think a story is spam or off-topic, flag it by clicking on its 'flag' link. The full text of the guidelines can be found via the link at the bottom of the HN main page.