Common sense can best be thought of as the collection of small facts that people have acquired through thousands of years of observing humans and the results. e

Common sense can best be thought of as the collection of small facts that people have acquired through thousands of years of observing humans and the results. eg, Folk Wisdom. It's much more useful than you seem to think it is. Look at priming. It was a recent academic fad, Malcolm Gladwell included a big section on it in "Blink". The idea that you could influence people to walk more slowly by making them read a list of words associated with old age defied common sense. Surely someone would have noticed this effect before. And the result was that the common sensers were right. Key priming studies turned out to be outright fraud. The rest weren't repeatable.