It seems to me that there are two main sticking points in the discussions on
several list threads in recent weeks. One is computationalism: is it right or
This at least is straightforward in that it comes down to a question of faith,
final analysis, as to whether you would accept a digital replacement brain or
(Bruno's "yes doctor" choice). The other sticking point is, given
is right, what does it take to implement a computation? There have been
that a computation is implemented by any physical system (Putnam, Searle,
and by no physical system (Maudlin, Bruno Marchal). The discussion about
and the ontological status of mathematical structures, in particular, relates
second issue. Bruno alludes to it in several papers and posts, and also alludes
"movie graph argument", but as far as I can tell that argument in its entirety
available in French. Comments and elaboration would be welcome.
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