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Right, so if we suppose that the "punch-line" statement, describing the prisoner's state of mind, is true:

> the executioner knocks on the prisoner's door at noon on Wednesday — which, despite all the above, was an utter surprise to him.

Then it follows there are two false epistemological claims in the text. First by the judge:

>He will not know the day of the hanging until the executioner knocks on his cell door at noon that day.

This is false, as you correctly reason, since a knock on Friday would come as no surprise (at the time it occurred).

The second false claim, this time by the narrator, reinforces the first:

>Everything the judge said came true.

Not every claim the judge asserted was tested by the recounted physical events: There was no knock on Friday.




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