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https://news.ycombinator.com/newsguidelines.html
Edit: your account has unfortunately been posting a lot of unsubstantive and/or flamebait comments (e.g. https://news.ycombinator.com/item?id=45412687 and https://news.ycombinator.com/item?id=45404646). Can you please stop doing that? It's not what this site is for, and destroys what it is for—we're trying for something different here.
If you wouldn't mind reviewing https://news.ycombinator.com/newsguidelines.html and taking the intended spirit of the site more to heart, we'd be grateful.
It does fluctuate—we can't be immune from macro trends (https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...). But the principles we apply have been the same for many years, and if you step far enough back, the amount of politics is pretty consistent.
No, this is defined by the knowledge and skill involved.