Common

On the first glance, it seems unbelievable that while the appropriate choice of action is all too obvious to most of us, common sense is such a rare occurrence that so many people just pick the most silly way to go.

Oh, you are wrong on that.

Let's go back one step and consider. Common sense is in fact a very capability that everyone of us have - that's why it's called common. The only problem is we could use it for only two purposes:

1. To see the solution of others' problem.
   
2. To see the solution of our problem in retrospect.

Alas, it is just that most of us cannot use this extraordinary talent to solve our problem at hand.

And we call them genius for the few who could do so.

I think I should be less cynical.