yes, we are limited if we have to assume that God exists, but it prevents this thread turning into a Science vs God thread where emotions run riot and they end up getting locked. It is better to be limited than to be insulting. Besides, by the very nature of the thread "God, the couch potato?" one has to assume that God exists, or else you cannot address the rest of the question.
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I think the "Does God exist" threads have been done to death.