Science does not prove things true. It proposes ideas and then tries hard to break them. An idea that has survived a lot of testing is the best bet available — not a certainty. So every answer says where the evidence points, how much testing the idea has survived, and what is still argued about.
And every answer shows you how to check it yourself, for free, without taking anyone’s word for it — including ours.
Ads, in a sidebar, clearly labelled. They are chosen and served by an ad network, not by us. Advertisers cannot influence an answer, sponsor a verdict, or see anything before it is published.
The instructions we give the AI are published in full. Anyone can read them and suggest changes.