The biggest problem I have with psychology is that it deals in generalizations, but is used by some to make specific claims about individuals. As a group, people tend to behave within certain parameters, but individual variations within that group can vary tremendously. Not everyone who suffers a trauma, be it physical or emotional, will respond in exactly the same way. There may be similarities, but there's no hard and fast rule. So I agree with thir, it's not an exact science, and I'm not sure it should be classified as a science at all. More of an art form than anything else.