Lucas can't know when his Gödelization procedure is applicable
For the Lucas argument to work, Lucas must still be able to tell which machines are consistent. But this is mathematically impossible.
G. Lee Bowie (1982).

Note: For further explanation, see Church’s theorem as discussed in Hunter (1973) or Enderton (1972).
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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
The problem of consistency »The problem of consistency
The mechanist's dilemma »The mechanist's dilemma
Lucas can't know when his Gödelization procedure is applicable
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