Videos on the Modal Ontological Argument.

The most accepted version of the modern Ontological Argument is from Alvin Plantinga. It goes as follows:

  • A being has maximal excellence in a given possible world (W) if and only if it is omnipotent, omniscient and wholly good in W ; and
  • A being has maximal greatness if it has maximal excellence in every possible world.
  • It is possible that there is a being that has maximal greatness. (Premise)
  • Therefore, possibly, it is necessarily true that an omniscient, omnipotent, and perfectly good being exists.
  • Therefore, [by Axiom S5 (which states: “necessary existence is positive”)] it is necessarily true that an omniscient, omnipotent and perfectly good being exists.
  • Therefore, an omniscient, omnipotent and perfectly good being exists.
  •  

     

    Summary

    This argument is made for those with the affirmative claim that, “God cannot exist logically.”

    The OA’s rebuttal to that statement basically follows:

    – When you say “God,” you probably mean “the Greatest possible Being.”
    – But wouldn’t the Greatest possible Being be able to exist in all possible worlds?
    – Therefore, God does exist logically.
     
    Assumptions

    – We have a definition of God
    – There is a Greatest Being
     

    Importance

              The possibility of God is logically coherent.

     


     

    References

    “Ontological Proof.” Wikipedia. Wikimedia Foundation, 13 June 2012. Web. 21 June 2012.

    Drcraigvideos. “The Ontological Argument – Part 1 – William Lane Craig.” YouTube. YouTube, 05 May 2011. Web. 21 June 2012. <http://www.youtube.com/watch?v=D1-ySbzmrEI >.

    Drcraigvideos. “The Ontological Argument – Part 2 – William Lane Craig.” YouTube. YouTube, 05 May 2011. Web. 21 June 2012. <http://www.youtube.com/watch?v=PdO7agEqAZI >.

    Drcraigvideos. “The Ontological Argument – Part 3 – William Lane Craig.” YouTube. YouTube, 05 May 2011. Web. 21 June 2012. <http://www.youtube.com/watch?v=umpf5ugpkLU >.

    Plantinga, Alvin. The Nature of Necessity. Oxford: Clarendon, 1974. Print.

    Semperadlucem. “Ontological Argument.” YouTube. YouTube, 28 June 2009. Web. 21 June 2012. <http://www.youtube.com/watch?v=iCXvVcWFrGQ >.

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