Highly flexible systems aren't mechanistic
But a machine that generates new programs, treats its machine table is a changing object, and shifts between programs would involve auxiliary devices that can't be modelled on the Turing machine (as Dennett presupposes).
Dennett presupposes that a machine that can take the guise of multiple formal systems is a Turing machine.

The need for auxiliary devices that can't be modelled on a Turing machine means that the machine Dennett describes is not a mechanistic model of the mind.

Thomas Tymoczko (1990).
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Artificial Intelligence »Artificial Intelligence
Are thinking computers mathematically possible? [7] »Are thinking computers mathematically possible? [7]
No: computers are limited by Gödel's theorems »No: computers are limited by Gödel's theorems
Gödel limits formal systems not machine implementations »Gödel limits formal systems not machine implementations
Highly flexible systems aren't mechanistic
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