If you’re skeptical of western power structures and you’ve ever engaged in online political debate for any length of time, the following has definitely happened to you:
You find yourself going back and forth with one of those high-confidence, low-information establishment types who’s promulgating a dubious mainstream narrative, whether that be about politics, war, Julian Assange, or whatever. At some point they make an assertion which you know to be false — publicly available information invalidates the claim they’re making.