About common sense. I went to amazon's site and looked for books on common sense. There were none. Oh, there were books with those words in the title ("Common Sense Investing") but none on common sense per se.

With the Sunday paper I get a small magazine called Parade, and one day several years ago a columnist in Parade was asked why schools don't teach common sense. The columnist said that we have to learn common sense from our families. Since then, I've wished I could read more about that.

What do you think are the elements of common sense? I start with:
       risk versus reward
       science versus rumor.