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Article 2419 of comp.ai.philosophy:
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>From: markh@csd4.csd.uwm.edu (Mark William Hopkins)
Subject: Re: space-time locus of the existence of "pi"/re: platonism(was Re:
Message-ID: <1991Dec27.225435.19412@uwm.edu>
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Organization: Computing Services Division, University of Wisconsin - Milwaukee
References: <2202@ucl-cs.uucp> <1991Dec24.225916.25800@aio.jsc.nasa.gov>
Date: Fri, 27 Dec 1991 22:54:35 GMT
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In article <1991Dec24.225916.25800@aio.jsc.nasa.gov> basham@aio.jsc.nasa.gov writes:
>Actually, I don't think are "true" circle does exist.

A true circle is in actuality a physical pattern of neural activity in
humans and likely other creatures that is activated on the perception of
something that "looks like a circle".  Thus perfect circles exist (albeit
in a somewhat convoluted form).

Of course, by that argument, everything that is platonic has physical existence
as patterns of neural activity.

More generally, in performing statistical mechanics on the brain treating the
set of neurons as a collective system, a circle will be an "attractor" of the
system.

In that light, we can say that nobody knows what a circle really looks like
yet...


