I mean, there might be a secret AI technology that is so advanced to the point that it can mimic a real human, make posts and comments that looks like its written by a human and even intentionally doing speling mistakes to simulate human errors. How do we know that such AI hasn’t already infiltrated the internet and everything that you see is posted by this AI? If such AI actually exists, it’s probably so advanced that it almost never fails barring rare situations where there is an unexpected errrrrrrrrrorrrrrrrrrrr…
[Error: The program “Human_Simulation_AI” is unresponsive]
That quickly boils down to “How do we know anything?” and the answer to that is “We don’t”. When you think hard enough about anything you can come up with an explanation why what we think to onow and believe is wrong. To get around that irl you can employ different tactics. For example, you can check how plausible sonething is. How many assumptions do you have to make for a theory? Usually, more assumptions means less plausible. And you can ask yourself " why does it matter? What would it change for me?" and the answer is most likely it doesn’t and nothing.