How to Ferret Out Motive in People

How do you ferret out motive in people? Well, one of the ways that you can. is when you start to, because this motive is all about interest. Like whose interests are being served here? Right? Are they for what I'm for and want to drive what I's for in this context? Okay. And then thirdly, how do you get duped on motive? Not asking enough questions, believing things at face value.