What does it mean when someone cross their arms? It means they're being defensive. Or when someone cannot make eye contact? - they're being deceptive. In fact, this is all nonsense. As a species, we are terrible at reading body language. Who knows why someone crosses their arms or doesn't make eye contact. We need more information before we can make a judgement. However, there are things we can do to move the needle in the right direction. We can find areas of interest that we can then probe further. In his book, The Truth About Lying, Walters puts forward 7 keys to understanding a persons verbal and non-verbal output. With these keys you can get a lot closer than most to spotting when someone is lying to you.