The point of this example is that there is (obviously) no difference in effectiveness. However compare this simplified example with the following citation from

The point of this example is that there is (obviously) no difference in effectiveness. However compare this simplified example with the following citation from the article: >“On many occasions I have praised flight cadets for clean execution of some aerobatic maneuver, and in general when they try it again, they do worse. On the other hand, I have often screamed at cadets for bad execution, and in general they do better the next time. So please don't tell us that reinforcement works and punishment does not, because the opposite is the case.”