J. Budziszewski, over on CERC tells three stories to show the inconsistency of moral relativism.
This one is priceless.
One day a student approached me after class. He reminded me that I had mentioned moral law during the lecture, then said “Last semester I learned that there isn’t any moral law. Every society makes up its own right and wrong, its own good and bad, its own fair and unfair – and each one makes up something different.”
I answered, “It’s a relief to hear you say that, because I’m lazy and I hate grading papers. At the end of the semester I’ll be able to save myself some work by giving you an F without looking at your papers at all. Since you don’t believe in moral standards like fairness that are true for everyone, I know you won’t object.”
He shot me a startled glance – then admitted that there are true moral standards after all.
Read the rest here.