When I was in engineering, I had to take a philosophy course. Prof was annoying. The typical philosophers were discussed in the class; somewhat interesting. But, he had this habit of "just because you can see this desk, does it really mean it's here? Just because you can hear me tapping the desk, does it mean it's here?" It's not a desk, it's a table, you moron.
But, I was willing to play the game, up to a point. At that university, they had a really big art program. Art students spent half their time stoned out of their minds - well, perhaps it wasn't the effects of drugs - that was just the way they were most of the time. To this day, I recall what earned an F for me quite well. We were looking at modern art - something that I can't stand - and discussing the artists' deep meaning behind the art. One of the paintings had a bunch of concentric squares. The innermost square was yellow, then red, then blue, then white, then red. One by one, he asked students what they thought the deep meaning was behind that design. "Wowwwww, mannnn, this is realllly speaking to me about emotions. I think the yellow at the center is cowardice, but like, he's really trying to fight that cowardice and the red shows his anger at himself. And after anger, cancer victims usually feel sadness, that's like the next emotion. But then, there's that period where you're not emotional and just like kinda accept it, that's the white. But then, there's the red. The red is the hope."
"Wow, excellent. How about you John?"
"I think it's a political statement. Like the center is China and surrounding that is the Red of communist Russia, because Russia is superior to China. But, surrounding both of those is the Red White and Blue of the United States because we're the most powerful nation."
"Wow, excellent. How about you, DrPizza"
"Maybe the artist was just doodling? Maybe the deepest meaning is simply that the artist was bored. <holds notebook up for professor to see> See, I'm doodling, and my designs are better than a bunch of concentric squares colored with primary colors. The only meaning to my doodles is that this is really boring."
Wrong answer, especially in a course where the professor could give you any grade he felt like, since it wasn't based on tests with questions where an answer would be clearly correct or incorrect.