You never know, after all maybe your whole life just happens inside a big box (or a small one if you are a simulated/real brain in a vat). But if you accept th

You never know, after all maybe your whole life just happens inside a big box (or a small one if you are a simulated/real brain in a vat). But if you accept that it's possible to gain some information, and to basically slowly build up a model of the real, so you can start trusting sources of information, eventually you can build a ceremony model and there are designated witnesses, and designated key-holders. And in theory press should regularly interview them to make sure they are trustful, mentally okay, they are not blackmailed, or otherwise tampered with, and what they say about the process, safe, stream, etc. So in the end it's all about your priors. If you have an almost unmovable belief about we're all just being lied to, then you might never (as in not in <100 years) update to the alternative belief.