Still, if I decide to go on a search for God and yet tell you that I will not find God, not even in thunderbolts, wet fleeces or plagues of locusts and tell you that all these things have normal rational explanations, then I'm not really looking for God.
True, but how does that apply to creationism or ID?
I cannot engage in a thought experiment or a scientific experiment if I already know the 'answer'. If I decide that God does not exist and deny all proofs that he may throw my way, or refuse to see God in creation no matter what scientific evidence is demolished, then I am not engaging in a valid thought experiment. I'm making a statement of faith (there is no God) and everything fits around that.
From what I can tell the young earth theorists rely heavily on the Bible being a factually historical record that can be relied upon. To accept that I have to accept divine inspiration, otherwise all the usual questioning of human history has to take place, and besides that there were at least a few days that even Adam missed out on. It becomes this argument - I believe in creation because I believe in Genesis which tells us that God made the earth, and I believe in Genesis because I believe God inspired its writing. That's all fine, if you believe in God, remove that and the argument falls to pieces, which I'm sure those theorists know.
To then claim that all scientific understanding of the age of the earth is wrong based on that claim is to conflict science with faith. It's no more scientific than that. I guess that'll need some sort of proof that natural processes (radioactive decay of carbon-14...) may have occured at varying rates, other than the proof that Genesis offers. Otherwise it is an unsubstantiated claim based on knowing the answer and looking for the method.
Why would Darwin look at minute changes in life forms and layers of increasingly complex life in fossil findings and posit that they arose through blind chance? Wouldn't the natural result of such research be to hypothesize that God created more simple and then more complex forms and gave them the means to adapt? Why make the leap that these things happened by chance and mutation? It seems to me that Darwin and his immediate followers were the ones intent on finding an atheistic answer.
I've always had issues with the concept of mutation as a method of evolution, but perhaps I am coloured by my own experience of bad mutations. Natural selection through breeding over enormous timescales always made more sense, so perhaps all men will look like Brad Pitt and all women like Angelina Jolie if there are just too many centuries of vacuousness to come.
Darwin may not have believed that God created so much as the hairs on his feet, and his theory may reflect that. But also Darwin's theory represented the best he could answer those questions when relying solely on what could be known, what can be hypothesised about with the hope of establishing a way of proving that at least elements of that hypothesis are correct. Can we answer scientific questions by incorporating and relying on non-scientific 'fact'?
What I'm left with here (when discussing young earth theory) is two arguments - one is that this is the best that is understood by humans, it's not perfect (and shouldn't be treated or taught as such). And the other is that all human understanding is wrong (dating techniques etc) because it doesn't fit with a book written several thousand years ago, which is factually correct. Maybe I'm parodying a little. The sky is clear blue today, I should be safe from thunderbolts, at least on the basis of my understanding of the mechanics of thunderstorms and there being no God, I should be safe.