"common sense is not so common"

Yes, I agree with this statement. You see grown people doing things that even first graders know not to do such as forgetting the fact that a cup of coffee is served hot and placing it between their legs when they drive to work such as the woman who sued McDonald's. Then there's the idiot who tried to climb Mount McKinley, the tallest mountain in North America, in tennis shoes. I don't walk and have certainly have never climbed anything but even I know not to do that. The scariest thing to me is that these people might breed. They would lower the human intelligence level by several points. It would be like my cat, Richard, breeding with my friend's cat, Velcro. I think they would lower the intelligence of catdom as a whole if they had offspring. I know this sounds mean but it's true. The same thing applies to human beings.

It is true that common sense is the most uncommon thing in the world.Common sense is the fruit of one's practical experiences and the lessons learnt in the process of using certain objects or things. It is the call of one's inner mind without making any finer analysis and judgment of the associated factors and issues. It is not based on established theoretical principles,but more related to one's intuitive capacity and experience based knowledge. It is more effective,acceptable and powerful. Thanks.