text: The idea that you could fully decipher what someone is feeling based on how they look is absurd. You cannot decide for yourself how someone feels based on the movement of their muscles. For example, if someone looks sad, you cannot just decide that they are sad, just because they look that way. If a machine decides I look confused, does it really have the right to change what I am learning? To understand how someone is really feeling, you have to first ask yourself why they might be feeling that way. Once you understand this, then you can determine what is happening. A machine cannot read minds. If I am confused about one thing, the machine does not know what. Not to mention that people often feel varying emotions at varying times of the day. I might be sad one minute, then laugh at a joke the next. I might not understand something, than understand it in the next second. The machine might automatically change something I understood based on a few seconds of confusion. This is not efficient or helpful.