Well, the problem there is that we know that not *all intelligence* that exists is human. We’ve already got that stated by the Bible.
So, there is other intelligence out there. And furthermore, not all things that have happened on earth, has been *only* from human causes or natural causes (of the physical processes of nature).
We’ve already been told that many things have happened and things have been seen and/or changed, on earth from things *other than* (1) humans and (2) nature and it’s natural physical processes.
We already know from what the Bible says that other things happen on earth that are outside of human and physical, natural causes.
The Bible has already added another element of “intelligence” to the equation, that is not human...
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Let me give you an example... just one..
The “intelligence” that was exhibited on the wall of the hall where Daniel was called in to read and translate what was written on that wall — was not human.
Now, using your logic, we would have to conclude that this happened by some human intervention (probably some “secret society” of humans... doncha know... LOL...).
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Oh..., another example of something other than “human” intelligence...
When Lot was dragged out of the city about to be destroyed, that was done by something else other than human intelligence. It was intelligence of a different *non-human* kind. If we were to use your reasoning, we would have to conclude, if intelligence was exhibited by something that happened, it had to be human, and therefore Lot was taken out of the city by another human.
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Okay, one more example of “intelligence” that was not human. When Moses brought down the tablets of stone from the mountain after leaving Egypt with Israel, there was “intelligence exhibited” by the writing on that stone. To use your reasoning, we would have to conclude that the intelligence that was exhibited there was some human (that did it). Therefore the question is raised, what human made those tablets of stone that Moses took down from the mountain?
We could go on and on with these “intelligence” examples...