The answer is the presence of a special kind of pattern. In addition to an improbable structure we see a shape or pattern that matches one we know from independent experience, namely, from seeing the human face and even the specific faces of the presidents on money or in history books. Thus, Dembski suggests that the improbability of the structure by itself does not trigger our awareness of prior intelligent design. Instead, intelligent agents recognize intelligent activity whenever they observe a highly improbable object or event that also matches an independently recognizable or meaningful
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