I’ve skimmed the articles you’ve linked to. However, I have an honest question: how do I decide whether the linked sources are trustworthy? Ok, there’s a book b

I’ve skimmed the articles you’ve linked to. However, I have an honest question: how do I decide whether the linked sources are trustworthy? Ok, there’s a book by a guy who claims to have interviewed Chinese doctors and policemen. But why should I trust him?