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Re: Everything I say is false.

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Louis Valence <lvalence@example.com> writes:

> 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!

I've been distracted!  The question says ``check all that apply''.
Anyhow, well done!

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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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