We have learnt in school about the basic sense organs in our body. hear, sight, sense, taste and smell. But in reality there are many more senses which no one taught us at school. A quick look at those Incredible Senses which you will be able to identify only of you notice them sharply.
A smile can be easily identified if it is a fake one or a real one. Likewise, we can also identify if the person in front of us is lying.