For me the proposition "We don't know yet, therefore God" just doesn't work
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Whose proposition is that? Certainly a person at the end of his rope who calls out for God receives assurance that it does work. Many, many, many Christians started exactly there.
As for "therefore God", first all, we reach that conclusion because of what he has done for us personally, not because we are clueless.
What does the gap teach? That the boundary between science and God is artificial. That is a distinct point. If you can demonstrate that man really knows less and less, not more and more, then we have no basis to exclude a fact (God) demonstrated to us on grounds other than scientific grounds.
Does that not imply that when we do know we will no longer know God?
Yes. Thinking we do know will compel that conclusion. Many have reached that conclusion. Scripture suggests just exactly that result. Peoples hearts are at times hardened to help them complete that process of falling into error. But, for those of us who do know God, the question is whether there is any reasonable prospect that we will get to that point of knowing all the secrets or even the most basic ones, as opposed to being deluded in thinking so.
I would rather see God in the event of the big bang and the process of nucleosynthesis and galaxy formation, in the predictability of chemical reactions, in the molecular structure of DNA and how it is fashioned to permit evolution. In the elegance of the mathematical structures which seem basic to so much of nature's being.
All of which are perfectly compatible with the essence of ID.
I don't say God is not in the gaps, but I expect that when we fill in the gaps, God will still be there. Indeed, it is seeing God in what we know that assures me that God is in what we don't know yet as well.
Amen.
I don't see that principle operating very well in reverse.
Does anyone ever cry out to God from a position of really knowing the answer for which they cry out?
The principle in reverse worked for Abraham.
Rom 4:19
And being not weak in faith, he considered not his own body now dead, when he was about an hundred years old, neither yet the deadness of Sara's womb:
Rom 4:20
He staggered not at the promise of God through unbelief; but was strong in faith, giving glory to God;