it is human or animal. simple or complex.physical or mental.so we can say science which is used to solve human problems and to help them to live life more gracefully.so we can explain human behaviour as as activities of organism from birth till death expressed in terms of responses and reactions to stimuli.
Imagine a society that subjects people to conditions that make them terribly unhappy then gives them the drugs to take away their unhappiness. Science fiction It is already happening to some extent in our own society. Instead of removing the conditions that make people depressed modern society gives them antidepressant drugs. In effect antidepressants are a means of modifying an individual's internal state in such a way as to enable him to tolerate social conditions that he would otherwise find intolerable.”
“Mistakes are, after all, the foundations of truth, and if a man does not know what a thing is, it is at least an increase in knowledge if he knows what it is not. ”