Descartes - Objections to Causal Argument for God's Existence

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The further explanation of the vacuousness of the original argument is great. I have my doubts as to whether Descartes was being fully intellectually honest with himself there.

A ideas (possibly complex but ill understood ideas) further can also come from simple observations or principles and logical ideas that are expanded to their furthest logical extent. Mostly that is what the idea of God in this philosophical sense is " the maximally greatest perfect thing that underpins all existence and is good and loves puppies and such".

Decartes IS however arguing that he has an "A" idea as he further asserts that it was put there by "something else" rather than himself, and he is too limited to fully understand it. His justification for why that idea must be caused by something greater and realer is the real problem here.

"Suspicious" is a fine objection to the causal principle of ideas, because, if it isn't absolutely and evidently true then the argument can't support God's existence. The context of the argument in the meditations is that Descartes has doubted everything else that he possibly could with extreme skepticism to the point where he only truly believes he knows that he is thinking in the moment and now needs to support the existence of God proper to move forward from there.

If the first thing he comes up with from the point of raw "I am a thinking thing" is a suspicious metaphysical argument about the nature of reality proper then Descartes should throw out the argument in the same way he threw out other things he wasn't absolutely certain of beyond all doubt. He should definitely doubt that he can demonstrate via argument that only God itself could possibly be the source of his idea of God.