Re: Everything I say is false.

From	Louis Valence <lvalence@example.com>
Newsgroups	comp.programming
Subject	Re: Everything I say is false.
Date	2019-10-30 16:26 -0300
Organization	Aioe.org NNTP Server
Message-ID	<86k18mc9vs.fsf@example.com> (permalink)
References	(1 earlier) <qnncfr$qm8$2@dont-email.me> <86v9svmn9m.fsf@example.com> <qnqenj$1je$1@dont-email.me> <865zkrcrvh.fsf@example.com> <0ed80226-a4b8-4fcd-b84b-bc1418608ddb@googlegroups.com>

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Öö Tiib <ootiib@hot.ee> writes:

> On Monday, 14 October 2019 17:40:38 UTC+3, Louis Valence  wrote:
>> Richard Heathfield <rjh@cpax.org.uk> writes:
>> 
>> > On 11/10/2019 14:20, Louis Valence wrote:
>> >> Richard Heathfield <rjh@cpax.org.uk> writes:
>> >>
>> >>> On 09/10/2019 20:10, mikegonta@gmail.com wrote:
>> >>>> Everything I say is false.
>> >>>
>> >>> That's not true.
>> >>>
>> >>> But *some* things you say are false, and the above is an example.
>> >>
>> >> Fun with logic. :-)
>> >
>> > Indeed. Here's an age-worn and very familiar paradox (bear with me here):
>> >
>> > Side A:
>> > +------------------------------+
>> > + The sentence on the other    +
>> > + side of this card is true.   +
>> > +------------------------------+
>> >
>> > Side B:
>> > +------------------------------+
>> > + The sentence on the other    +
>> > + side of this card is false.  +
>> > +------------------------------+
>> >
>> > If you now turn the card on its side and inspect the edge with a
>> > powerful microscope, you will see the following words, carved in
>> > carbon atoms individually arranged by people with far too much time
>> > and equipment on their hands:
>> >
>> > +------------------------------+
>> > + Everything written on Side A +
>> > + and Side B is bloody stupid. +
>> > +------------------------------+
>> >
>> > Paradox resolved!
>> 
>> I'm slow, so bear with me.  Either A is true or false.  Assume it's
>> true.  Then B must be true.  But if B is true, A cannot be true.  Okay.
>> Then assume A is false.  Then B must be false.  If B is false, then A
>> must be true.  Contradiction.  So we can't satisfy both statements
>> together with either truth-value.  Alright.  I see it.
>> 
>> Here's perhaps my favorite version!
>> 
>> --8<---------------cut here---------------start------------->8---
>> What is the probability that you'll randomly answer this question and
>> get it right?  Check all answers that apply.
>> 
>> (a) 25% (b) 50% (c) 60% (d) 25%
>> --8<---------------cut here---------------end--------------->8---
>> 
>> I think this one is really interesting.
>
> Since there are 16 different ways to check these
> answers randomly and only checking none is correct
> the probability is 6.25%.

Cool.  You didn't assume you should check only a single answer.  You're
saying the question should be left blank.  I think you're correct.  It
is not, then, another case of Russell's Paradox.  Well done!

Thread

Everything I say is false. mikegonta@gmail.com - 2019-10-09 12:10 -0700
  Re: Everything I say is false. Richard Heathfield <rjh@cpax.org.uk> - 2019-10-10 14:42 +0100
    Re: Everything I say is false. Louis Valence <lvalence@example.com> - 2019-10-11 10:20 -0300
      Re: Everything I say is false. Richard Heathfield <rjh@cpax.org.uk> - 2019-10-11 18:38 +0100
        Re: Everything I say is false. Louis Valence <lvalence@example.com> - 2019-10-14 11:40 -0300
          Re: Everything I say is false. Öö Tiib <ootiib@hot.ee> - 2019-10-30 00:40 -0700
            Re: Everything I say is false. Louis Valence <lvalence@example.com> - 2019-10-30 16:26 -0300
              Re: Everything I say is false. Louis Valence <lvalence@example.com> - 2019-10-30 21:32 -0300
  Re: Everything I say is false. H E <rob99999999999999999@gmail.com> - 2021-01-22 15:21 -0800

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