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God exists ?

  1. Feb 26, 2005 #1
    Hartshorne's (1962) proof of the existence of god:

    (~) = not, (v) = or, (&) = and, (->) = implies (<->) = equivalence,
    [] = necessarily, <> = possibly, (=>) = strict implication,

    (p => q) =df [](p -> q)

    <>p =df ~[]~p.

    g = god exists.


    The argument is thus:

    1. g => []g (premise)
    2. []g v ~[]g
    3. ~[]g => []~[]g
    4. []g v []~[]g
    5. []~[]g => []~g
    6. []g v []~g
    7. <>g (premise)
    8. []g
    9. []g => g
    10. g


    This argument is valid but not sound.
    It proves that: ((g => []g) & <>g) -> g, is necessarily true, ..nothing else.

    The argument is true for any proposition p.

    1. g => []g
    7. <>g
    :.
    10. g


    A. (g => []g) <-> [](g -> []g)
    B. [](g -> []g) <-> (<>g -> []g),

    C. (g => []g) <-> (<>g -> []g)

    Note: A, B, C, are theorems of modal logic (S5).

    Because of C, the argument becomes:

    1. <>g -> []g
    7. <>g
    :.8. []g

    8. []g
    9. []g -> g
    :.10. g


    If we substitute ~g for g, we get the atheists' side of it.

    1a. <>~g -> []~g
    7a. <>~g
    :. 8a. []~g

    8a. []~g
    9a. []~g -> ~g
    :.
    10a. ~g.


    This argument has two other equivalent variations.

    1. [](g -> []g) & <>g .-> g
    2. [](<>g -> g) & <>g .-> g
    3. (<>g -> []g) & <>g .-> g

    Once we realise that: [](p -> []p) <-> (<>p -> []p),
    and [](<>p -> p) <-> (<>p -> []p), we can see that each
    argument is equivalent to 3.

    Hartshorne was wrong to assert that this argument proves that g (god exists) is true.


    It seems that Theists need only show that 'God does exists' is possible
    in order to prove that it is necessary or that it is true.
    And, that Atheists need only to show that 'God does not exists' is possible
    in order to prove that it is necessary or that it is true.

    Note: <>(god exists) & <>(god does not exist), is contradictory.

    What do you think?

    Owen
     
  2. jcsd
  3. Feb 26, 2005 #2

    Evo

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    I think it's a waste of time to even think about it. Do fairies exist? Do leprechauns or trolls or unicorns exist? God/fairies/leprechauns/trolls/unicorns are all the same. People believe what they want to believe, still doesn't make it real or true.
     
  4. Feb 26, 2005 #3
    I don't agree. Surely it depends on how we define: faries, leprechauns, or unicorns.

    I do agree that belief does not entail truth, but, you have not presented an argument for or against.

    Why don't these things exist, is the question!
     
  5. Feb 26, 2005 #4

    Evo

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    That's because there's no point in arguing about it, IMHO.

    Why? Why make something up and then ask why it doesn't exist? What is the point? You already know that the discussion is pointless since there is no proof for their existence (the burden of proof is on the person making the claim that something exists), why do people want to discuss pointless topics? Don't take me wrong, nothing against you or your topic. I am just really curious why people want to discuss such things, over and over and over. Hasn't this topic been beaten to death millions of times with no result?
     
  6. Feb 26, 2005 #5
    Your flippent understanding contributes no-thing.

    "You already know that the discussion is pointless since there is no proof for their existence (the burden of proof is on the person making the claim that something exists), why do people want to discuss pointless topics?"

    This is a very silly remark!

    Why is the discussion pointless?
    Why is there no proof of their existence?

    Your unsupported claims suffer from your own criticisms, don't they?

    If you know, then surely you can show why it is that you know.
    You did no such thing.
     
  7. Feb 26, 2005 #6

    Evo

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    You don't actually expect anyone to take a question like that seriously do you?
     
  8. Feb 26, 2005 #7

    arildno

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    Owen Holden:
    Prove that you don't have an invisible and intangible hat floating above your head.
     
  9. Feb 26, 2005 #8
    Quote:
    Originally Posted by Owen Holden
    Why is there no proof of their existence?


    Of course I do. If you claim that you know what existence means, then why would you have difficulty saying that x exists or not?

    For me: x exist means there is some property that x has, is confirmable.

    I can prove that 'the present king of France does not exist' because there is no property of it that can be confirmed.

    F(the present king of France) is false for all F.

    There is no property of: fairies, etc., that can be confirmed either.
     
  10. Feb 26, 2005 #9

    Evo

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    Really? Show me the quote of where I said that. I said the discussion was pointless.

    I wouldn't, if we were to be addressing something that had a point, which we're not. You're jumping to the conclusion that you've posted something that has enough substance to be discussed.

    Uhm, was this supposed to make sense?

    Like I said...

    Answer my first question. You said "Why don't these things exist (fairies, trolls, god, unicorns), is the question!" I asked "Why? Why make something up and then ask why it doesn't exist? What is the point?"

    If you can't answer my first question, there is no point in continuing.
     
    Last edited: Feb 26, 2005
  11. Feb 27, 2005 #10

    arildno

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    Owen: Just because you've learnt yourself a few squiggly signs, doesn't mean you are able to prove or disprove any aspects of reality with them.
    (One reason being, you haven't defined reality)
    I'm sorry, but here it is: Grow up.

    Understand this:
    The so-called god proof was complete nonsense at the outset, no matter who presented it first.
     
    Last edited: Feb 27, 2005
  12. Feb 27, 2005 #11
    I agree, that this thread has resulted in "flames" shows my failure in communicating with you.

    Perhaps we can talk in the context of a different topic. Perhaps not!
     
  13. Feb 27, 2005 #12
    A very bold and unsupported assumtion on your part.

    Why is 'God exists' nonsense??

    Can you support any of your claims?


    PS: at 70 I don't have time to "grow up".
     
    Last edited: Feb 27, 2005
  14. Feb 27, 2005 #13

    cronxeh

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    Mathematics is pointless if its not constrained. For all I care I can say from -inf to +inf the sum of all numbers is basically zero and therefore numbers dont exist.

    This is just what your 'logic' proof is - taking numbers, and manipulating them in a manner which will suite to _your_ desired answer.


    Physics on the other hand is based on experimental evidence, which defines the limits for the mathematics that are performed. Those 'limits' come from the experimental data which comes from the Universe in which we live in.

    If you are a theists and claim there is god, the burden of proof is upon you. First of all you are to prove that Universe has a purpose then you will say god created it, then you will say "therefore god exists". Second of all I will tell you that you werent around 16.5 billion years ago, and relativety back then was different than today - for all intensive purposes it could have been a vacuum, and the expansion occured from singularity. Where was god? What is an omnipotent all powerful thing that doesnt obey laws of physics?

    To me you are simply saying that god is the number 0 - wherever god goes he screws up the laws and nothing applies to god and that he created everything. Well to me, then, god doesnt exist

    Have a nice day
     
  15. Feb 27, 2005 #14
    Garblygook. Numbers clearly exist.

    Are you not (1), that is: obviously you are unique.
    How can it be otherwise??

    If you deny your own uniqueness, then we cannot talk at all !!!

    If there are no things then, you are not!
     
  16. Feb 27, 2005 #15

    Gokul43201

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    You said it yourself. The proof is independent of the choice of the assertion g, and hence should also hold for ~g, in addition to any other p.

    So, assuming the reasoning is not flawed, this calls into question the stated premise. How does one justify this premise in the particular case of the existence of "god" (which of course, I imagine you will define more rigorously) ?
     
  17. Feb 27, 2005 #16
    God is the icon for an original 'creator'. If all which exists was created, then God was created by a predecessor. I THINK I WILL WORSHIP HER...(she is beautiful and sexy)
     
  18. Feb 27, 2005 #17

    cronxeh

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    I am defined - right now I have the (x,y,z,t) coordinates assigned to my center of gravity, I have mass, I have a past and all the laws of physics apply to me. Simply put I belong to the 'matrix' of the universe - I am part of the grid.

    Your 'god' however doesnt have anything.
     
  19. Feb 27, 2005 #18
    What is God?

    From a physics standpoint, the question is what would be the physical characteristics of a godlike being, which depends in part on the nature of physical reality. The description of the God of Abraham implies a hyperdimensional being which would require the existence of higher physical dimensions.

    From traditional n-dimensional geometry we know that any projection from a higher dimension into lower dimensional space would possess the characteristics of the lower dimensional space. That is the projection can only possess the dimensions of the lower space. Thus detecting a hyperdimensional being would be difficult. The chaotic nature of physical reality would allow such a being to use very minor actions to affect changes. Effects created by such a being could appear to occur naturally, particularly if the being didn't want to be too showy.
     
  20. Feb 28, 2005 #19

    saltydog

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    My goodness people. It's just not there. God I mean. How fragile we all are, really. We invent all sorts to buttress survival in a harsh world still ruled by jungle law candy-coated by civilized rules of law and order.

    If religion and God aid in the survival of the gene pool, which I believe they do, then I shall find favor with them even if I know fully well, they pay homage to an empty hope.
     
  21. Feb 28, 2005 #20

    DaveC426913

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    An interesting statement. Note that it works both ways.

    Evo (for example) believes what he/she wants to believe. That doesn't make the existence of God any less real or untrue.

    Thus, the only thing we all are left with (atheists included) is that:
    - it is a personal choice, and that each choice is equally valid.
    - the only wrong choice is to conclude that someone elses choice is wrong.
     
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