The dialog about IQ and common sense is about a tendency, not an absolute.

One of the most consistent things I've experienced about people is this:

If a person has a very strong personality point somewhere in the spectrum of human attribute, they have an equally weak one somewhere else.

I've also noticed that people who have several moderately strong points tend to have several moderately weak ones.

It's like this. If you graph a single person's human attributes as X and level of strength or weakness as Y, and then average the amplitude of Y, the value of all people tested generally comes out to be the same, or close to it.

That's fairly consistent in my experience.

Note: The perception of strengths and weaknesses are another story because they are shaped by culture. For the above to work, you have to have a standard and factor the cultural coloration out. This process requires a lot of objectivity, which happens to be one of my strengths. <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />