To question what "is"

I was taught the concepts of "survival of the fittest" and "natural selection" and have incorporated these terms into my own vocabulary. In Paul's discussion, I realize how these terms are very misleading. Darwin's usage of natural selection leads one to believe that someone/something is doing the selecting even though change is supposedly random. Furthermore, survival of the fittest is redundant because to be fit is to survive. There is no measure of fitness. This discussion has made me reevaluate what have always been believed to be. I'd been inclined to accept whats given and hesitate to question what is known. From this discussion, I value skepticism even more.