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Author(s) -
Paul Smith
Publication year - 1973
Publication title -
school science and mathematics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.135
H-Index - 2
eISSN - 1949-8594
pISSN - 0036-6803
DOI - 10.1111/j.1949-8594.1973.tb09044.x
Subject(s) - link (geometry) , citation , computer science , information retrieval , world wide web , computer network
state-transition relation are mapped onto physical states-types related by a corresponding causal state-transition relation.” (Chalmers, 1994, p. 392) There is a little ambiguity in the two phrasings as to what the exact meaning of “mirrors” is supposed to be. Prima facie one would expect “mirrors” to mean something like “ is isomorphic to,” as “mirrors” usually indicates sameness in structure. Yet, the second phrasing does not seem to imply structural sameness, since it requires only [iso ] (i.e., that “formal states related by an abstract state-transition relation are mapped onto physical states-types related by a corresponding causal state-transition relation”), but not the other direction [iso⇐] (i.e., that physical states-types related by the corresponding causal statetransition relation have to be mapped onto formal states related by an abstract statetransition relation, too). Hence, with “mirrors” Chalmers seems to mean only [iso ]. At a different place in the text, however, he suggests [iso⇐] when he writes “... that the formal state-transitional structure of the computation mirrors the causal state-transitional