You're susceptible to misinformation to the extent that you can't verify a truth claim. And you can't verify most truth claims.
You can gaslight basically anyone about basically anything by playing epistemological games with them. Unless they have direct experience with the thing in question and they have personally observed the phenomena in question you can always get people to realize that they take everything they know on faith. It's a hell of a thing to realize.
I did this to my nephew recently with regards to Flat Earth when she said "but we have satellites up in space, so we know its round!" and I asked her "did you see the satellites go up into space?" and the penny dropped for her that she realized she took it on faith that the satellites were really up there and that if she wanted to find out if they really were or not that it would be one hell of a task.
Now, that's a pretty reasonable thing to take on faith and aside from a few conspiracy theorists there is broad consensus about that and it doesn't seem to be particularly contraversial. But our epistemology about most things boils down to that. We don't actually know anything. We are told things, we don't verify them for ourselves because it's way too expensive or not even possible for us to do so and we build our whole model of the world on that + things we personally observe.
You also can't explain basically how anything works in great detail. Look around any given room in your house and start going through items and explaining them in as deep detail as you can.
So with that as a reference point any time anyone has an explanation for something that provides more detail than your model has and they seem believable, it's actually not easy for you at all to tell when someone is bullshitting you either on purpose or because they are just as clueless as you. This is why we believe all manner of crazy, implausible things.