Although our senses have evolved to give us a detailed perception of the outside world, as soon as that information hits our brain it becomes biased and distorted, usually without conscious effort. Whether it's a romantic relationship or the planning of an offensive war, there are many opportunities to lie and self-deceive—but deceit and self-deception alienate us from reality and can lead to disaster. Why does deception play such a prominent role in our everyday existence?.

(From Youtube)