UndercoverElephant
Pachyderm of a Thousand Faces
- Joined
- Jan 17, 2002
- Messages
- 9,058
Thought is computational.
That particular hypothesis has been under very severe attack for at least the last fifteen years. It is now widely accepted to have been disproven:
http://www.pdcnet.org/pdf/2Searle.pdf
Paradoxically, cognitive science was founded on a mistake. There is nothing
necessarily fatal about founding an academic subject on a mistake; indeed
many disciplines were founded on mistakes. Chemistry, for example,
was founded on alchemy. However, a persistent adherence to the mistake is at
best inefficient and an obstacle to progress. In the case of cognitive science
the mistake was to suppose that the brain is a digital computer and the mind is
a computer program.
There are a number of ways to demonstrate that this is a mistake but the
simplest is to point out that the implemented computer program is defined
entirely in terms of symbolic or syntactical processes, independent of the
physics of the hardware. The notion “same implemented program” defines an
equivalence class that is specified entirely in terms of formal or syntactical
processes and is independent of the specific physics of this or that hardware
implementation. This principle underlies the famous “multiple realizeability”
feature of computer programs. The same program can be realized in an indefinite
range of hardwares. The mind cannot consist in a program or programs,
because the syntactical operations of the program are not by themselves
sufficient to constitute or to guarantee the presence of semantic contents of
actual mental processes. Minds, on the other, hand contain more than symbolic
or syntactical components, they contain actual mental states with semantic
content in the form of thoughts, feelings etc., and these are caused by
quite specific neurobiological processes in the brain. The mind could not consist
in a program because the syntactical processes of the implemented program
do not by themselves have any semantic contents. I demonstrated this
years ago with the so-called Chinese Room Argument
Searle's attack was just one prong of a multi-pronged attack. Computationalism is effectively dead. I am currently studying philosophy and cognitive science at one of the Universities which founded the discipline of cogntive science in the first place. People come from all over the world to study this subject at my Uni, but because of the developments over the past decade the funding for new projects based on computationalist theories of mind has dried up and the school of cognitive science was closed down. It is now just offered as minor for people studying majors in other subjects. computationalism is dead. If it's dead at Sussex University, then it's dead. OKAY....there is a small minority still defending it, but they are the oldest of the old school. They are the people who don't have an academic career any more if they accept it is dead. NONE of the people going through the system now are going to end up being computationalists precisely because they are now faced with the full force of Searle's arguments, and there really isn't any way to avoid their conclusions when put into an environment where pure dogmatisim doesn't get you anywhere and the people you are discussing it with properly understand the issues. The future of "cognitive science" lies in theories of consciousness stressing "embodiment", a move prompted by another cognitive scientist from Sussex called Andy Clarke. He wrote a book called "Being There: Putting brain, mind and world back together." The title is a reference to Martin Heideggers concept of Dasein or "there-being", meaning "being in a world". In other words, human minds are not computational at all - they are embodied, thus avoiding the frame problem.
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