The Liar's paradox

Discussion in 'General Philosophy' started by Speakpigeon, Feb 6, 2019.

  1. Speakpigeon Registered Senior Member

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    761
    This sentence is false. As the explanation of the paradox goes, if the sentence is false, then it is true since it says it is false. But if it is true, then it is false since it says it is false. Hence the paradox.
    If you think this is a paradox, please explain briefly how you solve the paradox, if you think you do.
    Second, if you think it is not a paradox, please explain briefly why.
    Finally, do you think it should be possible to prove there is in fact no paradox.
    Thank you to stick to the point and refrain from personal attacks.
    EB
     
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  3. Beer w/Straw Transcendental Ignorance! Valued Senior Member

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    *meh*


    Is not: "This statement is false".
     
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  5. Sarkus Hippomonstrosesquippedalo phobe Valued Senior Member

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    Yet more of your homework?

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    Can I recommend you give Wikipedia whirl? It may well give you all the answers you seek.
     
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  7. Quantum Quack Life's a tease... Valued Senior Member

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    Often not seen as a paradox but something similar could be:
    0 = x + (-)x

    or

    0 = (+)1 + (-)1

    For how can zero equal anything other than zero?
     
  8. LaurieAG Registered Senior Member

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    320


    @ 13:17 Giant: You may say one thing and one thing only; if you decide to tell me something that is true I will crush you with my bare hands, if what you say is false I will then be obliged to use my sword.
     
    Last edited: Feb 7, 2019
  9. Speakpigeon Registered Senior Member

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    761
    Sorry, love, the OP is "This sentence is false".
    You're quite a bunch here. Can't deal with the OP's question? Oh, never mind, just redact it.
    EB
     
  10. Speakpigeon Registered Senior Member

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    761
    Old story. Ancient Greece already had it.
    EB
     
  11. Speakpigeon Registered Senior Member

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    How can you be both alive and dead?
    EB
     
  12. exchemist Valued Senior Member

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    Ask Schrödinger's cat.

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    candy, sideshowbob and Beer w/Straw like this.
  13. Speakpigeon Registered Senior Member

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    Too late. The poor cat is really dead now.
    EB
     
  14. Beer w/Straw Transcendental Ignorance! Valued Senior Member

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    I have an Instant Pot Max* and I want to make wine with it.

    I'm still unsure on how to use it. It wants me to put in my altitude above sea level.
     
  15. iceaura Valued Senior Member

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    28,052
    You can get that from your weather station, or Google Maps.
    It would be more interesting to ask after the color of that sentence. I think it's a low saturation greyish green.
     
  16. TheFrogger Valued Senior Member

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    1,285
    Speakpigeon, it's a paradoxen. BOTH statements are true at the same time.

    This is unlike, " the glass is half-full/empty" statement, which DOES have an answer. If the glass was half-filled from empty, then it is half-full; if it was full and emptied to half, then it is half-empty.

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  17. Quantum Quack Life's a tease... Valued Senior Member

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    Is the liars paradox quoted in the OP a logical statement?
     
  18. Quantum Quack Life's a tease... Valued Senior Member

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    "How can a glass with nothing in it be considered as empty?"
     
  19. Quantum Quack Life's a tease... Valued Senior Member

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    an infinitesimal sphere has no volume
     
  20. Write4U Valued Senior Member

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    Absolute zero is - the lowest temperature that is theoretically possible, at which the motion of particles that constitutes heat would be minimal. It is zero on the Kelvin scale, equivalent to –273.15°C or –459.67°F.

    It depends on your point of reference.
     
  21. Write4U Valued Senior Member

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  22. Speakpigeon Registered Senior Member

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    761
    OK, really good point.
    So, the argument is true if you start by assuming it's false and it's false if you start be assuming it's true.
    I guess this is the point.
    EB
     
  23. Speakpigeon Registered Senior Member

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    What's your view?
    EB
     

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