Deep Thakur Posted about 2 years ago Common sense is not so common. Why? Paul: common sense is defined by Merriam-Webster as, "sound and prudent judgment based on a simple perception of the situation or facts." If it was up to me, I would label this subject "uncommon sense" or like you put it good sense. You are right in that some of these things are derived from our experiences, upbringing and such. But not all. Case in point, sometimes I find myself wondering if my parents don't get it either. I don't want to get hung up on terminology as much as the subject matter.