text: Technology is bound to mess up at one point. All humans and technology are not perfect. There is not such thing as perfect, so having technology that reads human expressions around may be cool until is messes up and reads ones expression incorectly. "A classroom computer could recognize when a student is becoming confused or bored...," ("Making Mona Lisa Smaile"). For exapmle if a student is intrigued by a subject and understanding what is being taught then there is no real reason for the subject to be changed. Imagone that a student sitting in class deeply engrossed in the sunject to vome to school the nect day and have to sit through a boring lession just because a computer read their expression wrong.