If we think commonsense is something that everybody has, well I have found myself lacking it many times. When we start applying our expert knowledge, say when a speaker does not work we do everything other than checking to see if the power pin is plugged! (Was that me?).
That aside, there is a grave danger when smart people start acting without commonsense. I shall illustrate what that can lead us to. Before that I want to be prophetic!
"There is nothing more dangerous than smart people without commoonsense". -- That was me!
I will come back. I have an assignment due tonight.