On Tue, Jul 3, 2018 at 9:09 AM, Lawrence Crowell <
[email protected]> wrote:

​> ​
> These ideas about algorithms that can detect nonsense seem to run afoul of
> Turing's proof there is no universal TM that can determine if all TMs can
> halt or not.


Yes, Turing said you can never determine if every program will stop, but
that doesn’t mean you can’t determine if some programs will stop. And I
think you would agree not every string of ASCII characters is a question
even if it has a question mark at the end. If a question about tomorrow
can't be answered even in principle the day after tomorrow then the
utterance made the day before yesterday was gibberish and the reason it has
no answer is the same as the reason a burp has no answer, neither was a
question.

John K Clark

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