text: Teachers know there students they see them everyday for a long period of time, they most likely are not going to be close to them but some students do become close to a teacher. In the text it says "Each expression is compared against a neutral face."(P.4) The author is telling us that everytime they do a emotinal expression they compare it to a regular photo. How can that show what people are feeling? In most cases most people have a neutral face when they are sad, mad or happy, they are this way because maybe no one taught them how to express their feelings. So how can you really know how that person feels?