Just learned today about how quantum theory implies that there is no such thing as a perfect vacuum. Very interesting as atomists had this duality of generic matter and pure void, while Aristotle rejected this duality....of course, you can't really come to a conclusive answer to a philosophical question, except perhaps to show sometimes that something what was once thought of as impossible is not only possible but actual.
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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I bring it to your attention because his main contention involved ontological dualism of matter and space.