When a Bad student, is uncomfortable with his knowledge, such as believing that he knows too much, he will find a way to destroy his results, such as staying up late watching a movie before the exam, going to a party the night before with his friends, going drunk to the exam, or simply do simple mistakes that reduce the results, mistakes that are not in any way logical, such as doing a full, complex and extended mathematic operation correctly, and then, in the end, instead of writing, let’s say, 10 plus 2 equals 12, write 11 for no reason whatsoever; or even forgetting to answer questions.