Imagine taking a test where the factually correct answer was irrelevant and what actually mattered was saying what the majority of the class said. This might be a fun exercise. Perhaps it could be a lesson about plurality and group decision-making. However, facts should matter, and just because the majority of the students in a class may think that the U.S. Constitution was ratified in 1776, that doesn’t make it true. Just in case you’re curious, the Constitution was devised in 1787, ratified in 1788, and adopted in 1789, but I digress…
Teachers like this with bizarre grading policies may be entertaining themselves, but they are not doing their students any favors. At the end of the day, their knowledge of the material is ultimately beholden to the knowledge and intelligence of their peers, which is obviously unfair. After all, there could be some total morons in that class.