But how can I prove to myself that my arm is there simply because I can feel it? I know only that my senses are reporting to my brain through impulses that my arm is supposedly there. But what draws the line between an observation and an inference? I need background knowledge of some sort to assume that my arm does physically exist; I could be hallucinating, or some kind of machine may be sending artifical impulses to me that are simulating the feeling of touching my arm. If this is a particularly good computer program, I might think I have physical proof that my arm exists, simply because I touched it, but that's no more true than a dream; it might make sense at the time, but it is not scientifically true, even if the majority of people tell me my arm is there and I certainly think it's there.

I'm not implying that we live in "The Matrix," but what constitutes "true truth?"

No. I suffer from mild autism, and it's shaped who I am today, for better or for worse. My son is severely autistic, and I love him and would never have wanted for him to die. I think he is happy too. Of course, I can't delve into his mind, but I was never one to put someone out of his/her suffering anyway, because I wouldn't have the heart to end someone else's life without his/her consent.

If what you say is true, then nothing at all is scientific fact. If even one person doubts, unreasonably or not, even the most fundamental laws of physics are only theories.

Therefore, evolution has not been scientifically proven. It has been heavily supported by evidence, but this evidence is not substantial enough to "prove" this theory. The question is specifically "Has evolution been scientifically prove[n]?" and the response, even here, is "No." There is no mathematical formula, there is no absolute evidence in its favor. There is reasonable doubt, no matter how little.

No. That's why it is called "Evolutionary Theory," not "The Law of Evolution."