Both sides would grant that if the Old Testament is true then God exists. But it would be an appeal to ignorance by the theist to simply assert that it is true unless the atheist can prove otherwise. That is, one may not say, "I am presupposing that the OT is true until you prove otherwise." And the atheist would be committing the fallacy of denying the antecedent if he or she argued that because the OT is false, it follows that God doesn't exist. Why? Because there may be other reasons besides revelation for affirming God's existence: consider, for example, as the reasons that made Plato to affirm the existence of a kind of supreme being, which he called the Good, and the reasons that made Aristotle affirm the existence of a highest being, which he called Thought. These and other reasons may be marshaled as parts of a longer argument that demonstrates that the same Supreme Being is provident (which is what both theist and atheist mean the word 'God' nowadays). These reasons may be available to us even if we are ignorant or doubtful about the truth of the OT and NT. And for an atheist to focus on the question of scripture's veracity in the face of reasons for God that are independent any revelation is to offer a red herring.
Integral to Dembski's idea of specified complexity (SC) is the notion that something extrinsic to evolution is the source of the specification in how it develops. He compares SC to the message sent by space aliens in the movie "Contact." In that movie, earthbound scientists determine that radio waves originating in from somewhere in our galaxy are actually a signal being sent by space aliens. The scientists determine that these waves are a signal is the fact that they indicate prime numbers in a way that a random occurrence would not. What is interesting to me is the fact that Dembski relies upon an analogy with a sign rather than a machine. Like a machine, signs are produced by an intelligent being for the sake of something beyond themselves. Machines, if you will, have a meaning. Signs, if you will, produce knowledge. But the meaning/knowledge is in both cases something other than the machine/sign itself. Both signs and machines are purposeful or teleological...
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