" I'll never know what was going on inside his head, but I don't think he spent a moment questioning himself. " I hear statements like this on TV often, like

" I'll never know what was going on inside his head, but I don't think he spent a moment questioning himself. " I hear statements like this on TV often, like "Trump clearly believed himself he won the election". That makes me wonder, isn't an impostor someone who's trying to con us all the time. So of course they would do their best to make us think that they believe their lies themselves. But if we think they do then that probably just means they have succeeded in conning us into thinking that. I would think that in fact you can NOT be an impostor unless you can make it look like you yourself totally believe what you are saying.