Didn't have one as a dub, natch
It took some time after leaving to develop. Got burned enough times I suppose. Sad but true fact of this world. But I bought the ticket.
These days it's a little hypersensitive and needs some tweaking. Works pretty good in general.
I like the alert analogy. I tend to mix logic of statements and reasoning with the getting a "read" on the person, physically speaking. Body language says a lot. Of course, natural born liars are tough to spot. That's when you rely on instinct.
Sometimes I like to have some fun with the lesser types of bs artists you meet from time to time. When in Rome,..... ;-)