Physical processes are computations only when we use them to externalize thought. Computation is the performance of one or more fixed processes within a contingent environment. We reformulate the Church-Turing thesis so that it applies to programs rather than to computability. When suitably formulated agent-based computing in an open, multi-scalar environment represents the current consensus view of how we interact with the world. But we don't know how to formulate multi-scalar environments. © Springer-Verlag Berlin Heidelberg 2006.
CITATION STYLE
Abbott, R. (2006). If a tree casts a shadow is it telling the time? In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (Vol. 4135 LNCS, pp. 41–56). Springer Verlag. https://doi.org/10.1007/11839132_5
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