Defensive Driving is not a rocket science. Basically, it is all about minimizing the odds of accident happening. As with many other things in life there is a science part and an art part to this. Things like checking tire pressure definitely go to the science part and can be taught and reproduced easily in no time. On the other hand anticipating other drivers' moves cannot be digitized, and depends heavily on your experience. Still, this is a skill that one can acquire.