I'd call it more specifically understanding the human nature and logically deducing their actions in relation to the environment. One has to have a good memory to be able to recall the past actions to compare to the current affairs. And from such comparison, the surest sign I look for is inconsistency, such as hypocrisy, not following through with promises, and gaslighting. If I see any of those, I do not trust them. If one has no established chain of logic to regard certain people or things as trustworthy or not, they have no incentive to ask questions. And a lot of people also tend to give their trust to the perceived sense of power and dominance without filtering through a chain of logic, such as anything portrayed by the mass media.