text: This first reason is very good. The muscles in faces can really tell the actual expression of an individual or even an entire class. In paragraph 3, line 2, the author says, "All 44 major muscles in the model must move like human muscles." This means it uses 44 different muscles in the face to figure out someones emotions. This can be very accurate it seems like, if you have an investigation and you have 44 pieces of evidence, how likely are you going to be right? Very likely.