Advances in Computers, Vol. 21

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Second, we must collect evidence for our statements by ob­ servation of events. \Ve "plug in" ob s erv ed data, so to speak, into the blank spac es which we have for them in our pre­ viously prepared propositional structure. If we boil a typical statement down to the over-simple form "value X relates to interval Y", then our two problems are the of Y and the collection ofevidencefor X. finitioll Now a set of independent propositions can be represented or symbolized by a set of perpendicular axes in a multi­ dimensional hyperspace.

An explanatory survey of some key terms of information theory 1950) is reprinted as an Appendix. (as of IN SEARCII OF 8,fSIC Sl'JfBOLS 43 This is to be contrasted with the typical activity of physical scie:ntific observation of which the goal is the making of a ntw repre:sention, repre­ senting some additional knowledge of lhat-which-is-physically-the-case concerning some unique space-time tract not heretofore represented anywhere:. We might put it crudely as the distinction between the replication and the formulation of knowledge.

Act as if recognizing) irrespective of size, shape, or orientation? What I have been describing is one possible way of solving the problem which in detail is hardly realistic as a model of appropriate to the presence triangularity, human brain mechanisms; but it illustrates a principle which I think we should not neglect: the representation ofa particu­ lar universal by a compresence and/or a sequence of the elementary in ternal acts involved in responding adaptively to it. PROBABILISTIC ASPECTS Now we come to the probabilistic aspect.

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