Geez louise, you guys! The word makes perfect sense. CapK's "example" is just a strawman designed to make it look like it means nothing; it merely misuses the word. The closest I came to experiencing polymentoricity in my educational experience was in the Chem-Physics course I took in which a chemistry professor and and a physics professor took turns sitting in the back of the room fuming at the irrelevant drivel the other was spewing at us poor students.