text: Even if we allowed camera's to scan the faces of students in school, we would not be able to decode their emotions in a speed befiting our educational system today. At the seventh passage, the author states that, "Your home PC can't handle the complex algorithms used to decode Mona Lisa's smile," suggesting that the majority of modern computers do not have the power to actually run the software. The PCs that schools buy are almost never more powerful than the ones bought by consumers for household use, and would thus also not be able to process the data, making the technology rather useless in an educational setting. Even if a school had the funds to buy a computer that could process the data quickly enough to be useful, there are simply too many students for that one computer to process, which would make the entire system useless.