Here is a great skill I picked up from Style, and I'd like to share it with everyone. It's a way you can tell if a girl is lying to you. There are two ways to do it, and I'll show examples of both.
The Breakdown
This works by looking at patters that the girl makes with her eyes when you ask her questions. When she says something that is true, she will always look in one corner of her eye, however when she lies, she will break that pattern; her eyes will move to a different corner or swim around her head looking for a lie to tell.
You don't have to use routines to be able to tell this, but its not a bad way to get it going. Also you never have to tell her what you did! Maybe you don't want her to know that you know her lies, and you can catch her and neg later.
Routine A:
PUA: Do you have a brother or sister (or whatever if they don't have siblings pick something that they know a lot about)
HB: Ok
PUA: Now think about 5 things about X and make one of them a lie. But don't think about them all at once, I'll count from one to five and you think about the answer sequentially.
So notice the patterns, eye movements and when she breaks the pattern, you know its a lie!
Routine B:
This really doesn't have to be a routine, it can be done in many different situations. The trick is to ask a lot of questions (about anything) really fast. When shes thinking about your question, her eyes will move in one of the corners of her head, to retrieve the memory. And for each one it will be the same, except again for the lie. So how to bust her?
Lets say you ask 10 questions, she answers them all right except for #5
And you know this because she broke the pattern. So after all the questions you can ask her, what did you say for #5? and she will stutter or try to remember the lie. and you can bust her
BUT beware, there are good liars out there.