Without the use of a lie detector you can never completely tell whether someone is lying to you or not. However, that doesn’t mean to say there aren’t scientific ways to make an educated guess as to whether they’re telling the truth or not. Here are 20 things to look out for that might arouse suspicions.
20. A liar will not exhibit a Duchenne smile. This is when you use the involuntary muscles around your mouth and eyes . The key word here being ‘involuntary’, it’s impossible to fake a true smile.