Do you know when someone is lying to you?

At work when I receive their credit report and see how many debts they actually have

Well I've mastered both my sons attempts at lying lol...they both laugh and smirk, so I always know.

For the most part I'm very good at calling BS with most people...but admit to being wrong on a few occasions.

actually i do i can tell i dont know how i know i just know whos lying and whos not.
sometimes they are not lying but they are hiding someting
that made me lose trust in almost every one

It's way easier if you can see their face. Lies over text are a pain unless you know them very, very well.

Instantly.

I give them the benefit of the doubt.