10. Make them lie: “Have you seen Ashley lately?”
With the question number 10 on our list of questions to ask someone to see if they are lying, you want to make him be untrue, so you can see his behavioral differences as to when he was telling the truth. Here’s where the incriminating info you had about Tony comes in handy.
It turns out a little bird named Tom-your-ex told you -before he dumped you- that before leaving for holidays, Tony had been hooking up with Tina. The catch? Weeell… Tony is kind of a shallow what-would-they-think a**hole, and the word around is that Ashley has gotten SUPER FAT over the summer. Naturally, being the prick he is, he wouldn’t want people to know they’d been bumpin’ uglies, so the chances are he’ll get super awkward and answer something of the “Uhm, no, I don’t know… Uhm…” sort. Meanwhile, this will make him give away all his lying quirks and tells.