One of the painful signs of years of dumbed-down education is how many people are unable to make a coherent argument. They can vent their emotions, question other people's motives, make bold assertions, repeat slogans-- anything except reason.
Someone once said that the most important knowledge is knowledge of our own ignorance. Our schools are depriving millions of students of that kind of knowledge by promoting "self-esteem" and encouraging them to have opinions on things of which they are grossly ignorant, if not misinformed.
Some full professors could more accurately be described as empty professors.