Wikipedia:Common sense is not common
 | This is an essay. It contains the advice or opinions of one or more Wikipedia contributors. This page is not an encyclopedia article, nor is it one of Wikipedia's policies or guidelines, as it has not been thoroughly vetted by the community. Some essays represent widespread norms; others only represent minority viewpoints. |
 | This page in a nutshell: What is "common sense" to you might not be so to others. |
The concept of common sense is a long-standing term, based on human experience and people's individual perceptions. Common sense isn't actually common, in either sense: it is different from person to person, and may not be employed even when many editors could agree on what it is in a particular situation.
It is sometimes said, common sense is very rare.
Thus, when discussing issues of importance to projects on Wikipedia, don't consider your position, or the position that you agree with, or even a position that has consensus, to be "common sense", because it's nothing more than your perception. Your idea of common sense is likely to contradict someone else's idea of common sense.
Instead of relying on "common sense" to make decisions, you should instead rely on building consensus for your position and perception, and work with other people to reach a conclusion most people can accept. By assuming your position is "common sense" and acting upon it, all you're doing is insulting the people who disagree with you.