My graph doesn't show a steady line. It's somewhat flat but there are peaks at some place. Based on the graph I plot, I conclude that human does not function like machines. This doesn't mean that there is not a mechanism for each human action. The difference is that the performance of human beings is somewhat unpredictable, while machines always generates the same result. Also, a human being can improve his or her performance through time by training, while a machine itself can never optimize itself.
