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Article 4881 of comp.ai.philosophy:
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>From: clarke@acme.ucf.edu (Thomas Clarke)
Newsgroups: comp.ai.philosophy
Subject: Re: A rock implements every FSA
Message-ID: <1992Apr2.132116.26024@cs.ucf.edu>
Date: 2 Apr 92 13:21:16 GMT
References: <1992Mar31.204900.10676@bronze.ucs.indiana.edu>
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In article <1992Mar31.204900.10676@bronze.ucs.indiana.edu>  
chalmers@bronze.ucs.indiana.edu (David Chalmers) writes:
| the single-state machine that always outputs 0
| and the 5-colour-map-checker are behaviourally equivalent, but most
| implementations of the single-state machine are certainly not
| implementations of the map-checker.
| 
You forget that Putnam embeds his rock in the physical world subject to  
non-repeating external disturbances.  Thus with proper of identification of  
{single state} X {physical states} the single-state machine implements the  
5-colour-map-checker, computationally as well as behaviorally.


