ArisKatsaris comments on The Parable of the Dagger - Less Wrong

53 Post author: Eliezer_Yudkowsky 01 February 2008 08:53PM

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Comment author: trlkly 27 April 2012 05:03:01PM 1 point [-]

Do I read this correctly--that there was no key?

Comment author: ArisKatsaris 27 April 2012 05:50:24PM *  4 points [-]

That's incorrect - the king's uttered words ("One box contains a key, to unlock your chains; and if you find the key you are free. But the other box contains a dagger for your heart, if you fail.") were still completely true. The key was in the first box, the dagger on the second.

It's just that the jester's reasoning about the supposed logical impossibility of the statements inscribed on the boxes was utter nonsense. He knew that neither of the statements inscribed need have been true, but he still foolishly argued himself into thinking that whether true or false they 'proved' the key being on the second box.

Comment author: ialdabaoth 13 October 2012 10:56:01PM *  6 points [-]

So then the actual correct solution, per the king's description of events, would be to ignore the inscriptions and just open both boxes?

Since the King didn't say that he'd be killed if he found the dagger, only that the dagger would be employed if he failed to find the key. Opening both boxes means finding the key, therefore, open both boxes.

(bonus points for chutzpah if he opens the box with the knife first, says "cool! this will make opening the other box MUCH easier!" and then uses that to get the key out of the second box)

Comment author: victordrake 11 April 2013 12:40:22AM 4 points [-]

King: Very clever. (to the guards) set him free from the top of the tallest tower.