Are you really saying that the grades you get in college courses are even remotely equivalent to a measure of how much random anonymous people agree with you on

Are you really saying that the grades you get in college courses are even remotely equivalent to a measure of how much random anonymous people agree with you on the internet? Granted, my GPA is much better than my karma, but I still don't see how thinking about math or CS problem sets all day is anything like filling the internet with your opinions/favorite links?