Q. Why is it not natural to think outside the square? Why does lateral thinking have to be taught?
A. Because, for 500 years, we’ve been taught to think inside the square, inside the bucket, inside the categories.
Excellent lecture from entertaining New Yorker, Professor Robert Sapolsky. Here he discusses inside-the-box-thinking (or bucket thinking or categorical thinking) with a class at Stanford. It’s an enlightening one-hour trip with a world-class teacher you can take during your lunch break.