Common sense is learned or acquired in life by us learning from experience and has to do more with emotional intelligence than with being intelligent.

So, how do you avoid not having common sense? We all need common sense to avoid outdated paradigms. 

How do you know if you lack common sense?

A person may be considered to be lacking in common sense if they continue to believe or do something when there is evidence to suggest they would be better off thinking/acting differently. We often say that such a person is “set in their ways” and unable to change.

The first thing to note is that common sense comes from experience in the school of life, not formal education

This brings to mind how the way ranchers and farmers graze their animals has not changed much from a time ago.