By the way, those who say that Judaism and general Halachic observance cannot survive a realization that following it cannot be justified through divine command actually devalue their religion and Halacha. They are essentially saying that the laws make no good sense in themselves and the only reason Jews will continue to do them is if they are convinced God commands it of them. They are saying that there is no internal value in the Law.
For other people who recognize value inherent to the Law, at least in a general sense, they don't need a divine source and it is through them that traditional observant Judaism will continue even after dogma falls.
Take that Mr. Professor.