Depends. You can trust most TV News programs when they tell you what the temperature was outside. You can't trust a weight loss product, unless it is drink water instead of soda. When I distrust something political, it isn't because someone else political told me they were wrong. Example: The infowars world is anti-vax. Older family members of mine were in terror over their kids contracting polio. Then the polio vaccine came out. Now, polio is almost eradicated. I know the polio vaccine had problems, but polio really was worse. When you collect good data on vaccines, the math shows nearly definite efficacy. Liar politicians will eventually contradict reality several times and you know to abandon their leadership. But our best critical thinking doesn't always get it right. That doesn't mean we should join the Jehovah's Witnesses.