Too often I (Andy Rutledge) notice designers and non-designers alike equating creativity with design. I find this assumption disturbing because it is one of the many fallacies that allow unskilled but creative pretenders to consider themselves capable design professionals when they’re nothing of the sort.

Creativity is not design. Creativity has nothing to do with design. Creativity is bound by no laws, rules, or strictures …which is perhaps why it’s so intoxicating (sometimes to the point of delusion). Design, on the other hand, is based entirely on math, psychology, human perception, and a host of rigid rules and laws that can be broken by only a highly skilled few. Those unfamiliar with these laws and rules, and the associated sciences are by no definition designers.

Check out his test very interesting:

15. In the image below, which object is influencing another object?

16. Does the influence you perceive in the example above imply motion or a static state?

(the rest of the article) from http://andyrutledge.com/