Most people think they have perfectly good bullshit detectors. But if that were the case, trial juries would always be unanimous, and we’d all have the same religious beliefs. Realistically, most people have poor filters for sorting truth from fiction, and there’s no objective way to know if you’re particularly good at it or not. Consider the people who routinely disagree with you. See how confident they look while being dead wrong? That’s exactly how you look to them. When it comes to any big or complicated question, humility is the only sensible point of view.