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property (cf. the simple artificial adaptive system of section 1.3). The need for detectors arises from the overwhelming flow of information in most realistic situations; the intent is to filter out as much "irrelevant" information as possible. |
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At each choice point, 1 through 6, there is to be a sign associated with each of the 3 possible directions x, y, z. If the symbol "Ù" occurs at the top of a sign the associated corridor belongs to the shortest path from the entrance to the goal; on the other hand, if the symbol "Ú" occurs at the bottom of a sign the associated corridor is to be avoided. Either symbol may be dark on a light background or vice versa. Thus, reduced to a 4-by-4 array of sensors (see section 1.3), either of the configurations |
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indicates the direction of the goal. Each experiment involves a set of signs indicating uniquely the shortest path to one of the three possible goals G1, G2, G3. In the terminology of section 3.4, the state at each choice point is given by the triple of signs there. That is, |
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Fig. 5.
A simple search setting: a maze with six choice points |
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