Its Not as Easy as On TV
Picking out the signs of someone lying is not like the TV show
Lie to Me, where the main character picks out one small facial tic and determines just by that the person is lying. While having a conversation with someone there may be hundred of movements and tics displayed but it doesn't mean picking out just one proves anything. Its more complicated than that, where as you have to look for many different signs but keep in mind its not foolproof since some people act strangely out of habit. So, here is what you need to know to start as a good baseline.