text: One reason why technology to read students is not benetfical is facial expressions can be seen and dosen'r have to be heard. In the passage pargraph four it states that, "The facial expressions for each emotion are univeral and individuals often show varying dgrees of expressions." Another reason is humans are the detecters of weather another persons like something or not. In paragraph five it states that, "In fact, we humans perform this same "calculation" everyday. For instance you can probably tell hoe a friend is feeling simply by the look on her face." Why need technology when people have their ouwn knowledge of whats going on with a person. Last reason is using your muscles called palpabraeus, in paragraph eight it explains that using your muscles you can spot certain faces a person is trying to make. It says, "To an expert faces dont lie; these muscles clues are used to spot when a smile politician or celebirty isn't being truthful."