Everyone has a tell; some body language that gives them away when they’re lying or up to something. And trained professionals can pick up on these signals. Right? Maybe not. After training TSA agents to understand body language, their ability to spot a liar was only slightly better than chance.

+ Think you can spot a liar? The NYT has a video quiz in which you have to decide whether the speaker is lying or telling the truth. I got (hiccup) every (brow wipe) single (foot tap) one right (vomit).

+ Don’t worry if you can’t read peoples’ emotions. Soon, your phone will do it for you.

+ Related: A Brief History of Evil Finger-Tenting.