steve wrote:I want to know why there is a presumption (insistence even) that there is something there, rather than the more commonsense presumption that there isn't. Certainly there are unknown things. Why suggest that the supernatural is one of them?
Why is there a bias toward magic and against reason?
Reason informs the biologist who examines the cell that there are parts and functions within the cellular body that are far too complex and specified to be a happenchance occurance. Furthermore, the DNA code within each living cell is just that: a code. As we all know, codes are rules for converting information from one form to another. The fact that there is information (about a reality) to be converted in the first place implies an order, since there must first be order in something (the reality) for there to be information in the first place. For example if I spoke the phrase "I am drinking Maker's Mark Bourbon", this is an ordered set of information, and in turn my utterance is the utilization of a code that informs someone of a reality. I am using my reason and knowledge of the code (the English language) to inform someone of this reality to someone. If I were to suddenly blurt out in place of that phrase "Thread cymbal but wire know three" it means nothing within the context of normal English (code) and is thus unintelligibile (and probably means I've had a little too much Maker's Mark!). So whenever we see things that are intelligible within the appropriate code or context that the thing is in, there is an implied order to the thing and thus an orderer.
Regarding your "commonsense": Since the natural sciences are more and more discovering out just how vast, intricate and ordered the cosmos is- by cosmos I mean the entire natural world around us from the tiniest observed piece of matter to the rest of the universe at large beyond the earth- it would therefore be sensible and reasonable to says "it's likely that's there's an orderer behind all this intricate order" to even though the senses cannot directly perceive this orderer. This common sense and consequent reasoning then will lead one to the conclusion that there must be a supreme, utterly unique intelligent agent who made an orderly world that we can perceive.
The notion of an intelligent orderer or agent is not therefore irrational or unreasonable.................or unscientific for that matter. In fact I'd go so far to say that any science that does not have the notion of an intelligent orderer/designer at least in the distant background is doomed to confoundedness and even irrational speculation.......we can see both of these things happening even now with in scientific circles which are totally consumed by atheistic evolutionism (note the "-ism").