Some joke that common sense is no longer common. They are incorrect.

Common sense is a system of processing information and addressing questions or problems. It is sometimes referred to as logic.

The word “common” in the term common sense doesn’t refer to it a sense common among people. Rather, it is the common, or universal way of successfully solving things.

Common sense cannot be taught. It can only be learned by the individual through trial and error, usually during the formative childhood years. Those who cannot , do not or refuse to recognize their errors won’t be able to learn it.