"While I may have the idea of substance in me in virtue of my being a substance, I who am finite would not have the idea of infinite substance in me unless it came from a substance that really was infinite." (Introduction to Philosophy ). Does Descartes prove the existence of God conceived as infinite substance by declaring that the existence of the idea of the infinite in a finite subject must have been put in the finite subject by some infinite substance?

Ascientist successfully predicts the outcome of an experiment. you watch carefully and know he didn't cheat. the scientist's success shows that: a) the scientist knows absolute truth about this experiment; success is not possible unless you know the truthb) the scientist was just lucky; no one ever knows what's going on, so successful predictions require luckc) the scientist may know the truth, or at least know something that is close to the truth, or the scientist may have gotten lucky this time; you can't be absolutely sured) the scientist really was cheating, even though you didn't see the cheating; no one can get things right, except by cheatinge) the scientist spent the night at a particular hotel chain and go a free breakfast, giving the scientist the ability to do amazing things