Asking, as Daniel Dennett does, what an antireductionist would have to say once he or she encountered a robot that behaved in every way in a manner indistinguishable from a human (okay, it wouldn't breathe, eat, excrete or reproduce), is kind of like my asking what he would say if, upon confirmation of the multiverse hypothesis, he also discovered that every single one of the component universeses is finely tuned for life. Okay, it is much harder to imagine how one might confirm the latter. But suppose that he did: what would he say to that?
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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