Because we were intelligently designed to apply our reason and senses to the world we live in. That does not negate the problem of testing, i.e. recreating in a scientific context, the big bang and all the history that has ensued. We all apply our reason to infer from the evidence what that history is about. Empirical science, as far as I am concerned, is about the here and now; what can be seen by the eyeballs as it happens. Since we are creatures of history, we are bound to make extrapolations, and are limited to our experiences. That makes for a particularly tenuous, tentative arrangement when it comes to declaring what is, was, and ever shall be.
I may regret posting a message to you, but here goes.
You're on record as saying you reject any science that conflicts with your young-earth creationist views. With this sentence, you have rejected yet another field of study: forensic science.
Science is not about the here and now. It is about connecting the past with the future. It is about taking our observations of things that have already happened, and using them to predict what will happen next.
In one careless statement, you have again totally redefined science to fit the confines of whatever your current argument is. For heaven's sake, just level with us and say you want young-earth creationism taught in school because that's what you believe, and that's what you think children ought to be taught. At least give us some forthrightness we can respect, instead of this endless Turing test.