The discussions here are a bit prosaic, though valid, but on a higher philosophical view you can check Descartes Discourse on the method. It is the basis of all natural sciences and the philosophical foundation of science and rational truth establishment. Maybe grab an explaineer on those ideas.

There are further developments that discuss the sociological proceeds of the scientific community. But the best start point is to always check any statement of truth and fact for four things: controversies, criticisms, corrections and praises. With those four elements you can assert for yourself the credibility of a source’s claims.