text: Students should use their minds when it comes to this, because you will be able to tell other people moods and yours also. In the text it states," The facial expression for each emotion are universal." What this means is that the facial expressions we use are used all over the world. So why not learn them your self instead of having a computer to do it for you. When you travel there will be facial expressions every where so it's best if you learn them on your own so you will understand what there moods are.