If I go into the woods and find an old cut stone channel and a cut stone dam as we did recently, l know I've found a remnant of something humans built. I don't mistake it for a natural formation. If I merely find stones, I might presume they formed by themselves through some natural processes. But I still have to question how the elements got there to allow them to form. If, however, I start studying how my own body functions, I can not decide this just happened by some natural means, because I see complexity far beyond that of humans cutting some stone and building a structure. In fact, I might try to copy the human eye and manage to create a camera. I might copy my joints and use the knowledge gained to create a machine. Obviously, I'm copying the work of a superior intellect. We all know this. Scientists use terms that suggest design all the time, they just claim something evolved to do this function, which in itself suggests intentionality that a natural function can't possess. It's like they dance around the obvious conclusion.