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- Newsgroups: sci.math
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- From: hporopudas@tnclus.tele.nokia.fi
- Subject: Re: Proof of God's Existence
- Message-ID: <1992Sep2.155839.1@tnclus.tele.nokia.fi>
- Followup-To: sci.math
- Lines: 92
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- References: <17ui6kINNsft@matt.ksu.ksu.edu> <pmanne-010992093107@ma-mac29.uio.no.>
- Date: Wed, 2 Sep 1992 13:58:39 GMT
-
-
- In article <pmanne-010992093107@ma-mac29.uio.no.>, pmanne@math.uio.no
- (Per Manne) writes:
- > In article <17ui6kINNsft@matt.ksu.ksu.edu>, bubai@matt.ksu.ksu.edu
- > (P.Chatterjee) wrote:
- >>
- >> I was told by somebody that there is a mathematical proof of God's existence; was wondering if somebody could shed some light on the same.
- >>
- >> Thanks. Looking forward to the response.
- >
- > The following proof is found in Seven Years of Manifold (1968-1980),
- > edited by Ian Stewart and John Jaworski.
- >
- > THEOREM (due to Anselm, Aquinas, and others.)
- > The Axiom of Choice is equivalent to the existence of a unique God.
- >
- > PROOF:
- > => (Assuming the equivalence of the Axiom of Choice and Zorn's Lemma.)
- > Partially order the set of subsets of the set of all properties of
- > objects by inclusion. This set has maximal elements. God is by
- > definition (according to Anselm) one of these maximal elements. Now
- >
- > God c God u {existence} [c - subset, u - union]
- >
- > hence God = God u {existence}. Therefore God exists.
- > To prove uniqueness, let God and God' be two gods. Then
- >
- > God u God' c God
- >
- > (according to Aquinas), therefore God' c God. Similarly God c God'.
- > Hence God = God'.
- >
- > <= Given a set {A_i : i \in I} of sets, let the unique God pick
- > x_i \in A_i for each i \in I. (He can do so by omnipotence, proved as for
- > existence above.) Then [in TeX notation, or it will look too awkward!]
- >
- > (x_i)_{i\in I} \in \prod_{i\in I} A_i
- >
- > as required. QED
-
-
- What this really proves. ?
-
- If we make a substitution God = "existence", we get (modified from above):
-
- ------------------------------------------------------------------------
- > THEOREM (due to Anselm, Aquinas, and others.)
- > The Axiom of Choice is equivalent to the existence of a unique existence.
- >
- > PROOF:
- > = (Assuming the equivalence of the Axiom of Choice and Zorn's Lemma.)
- > Partially order the set of subsets of the set of all properties of
- > objects by inclusion. This set has maximal elements. Existence is by
- > definition (according to Anselm) one of these maximal elements. Now
- >
- > existence c existence u {existence} [c - subset, u - union]
- >
- > hence existence = existence u {existence}. Therefore existence exists.
- > To prove uniqueness, let existence and existence' be two existences. Then
- >
- > existence u existence' c existence
- >
- > (according to Aquinas), therefore existence' c existence. Similarly
- > existence c existence'. Hence existence = existence'.
- >
- > <= Given a set {A_i : i \in I} of sets, let the unique existence pick
- > x_i \in A_i for each i \in I. (He can do so by omnipotence, proved as for
- > existence above.) Then [in TeX notation, or it will look too awkward!]
- >
- > (x_i)_{i\in I} \in \prod_{i\in I} A_i
- >
- > as required. QED
- -------------------------------------------------------------------------
-
- I think that this does not prove anything.
-
- Also the following (modified):
-
- ------------------------------------------------------------------------
- > objects by inclusion. This set has maximal elements. Existence is by
- > definition (according to Anselm) one of these maximal elements. Now
- ------------------------------------------------------------------------
-
- is questionable, because it is not sure that existence can be uniquely
- characterized as being one "maximal element".
-
- Although this proof above seems to be unbelievable and I first thought that
- God's existence is an axiom, maybe I was wrong in the latter, maybe it is
- really possible to prove mathematically that God exists.
-
- Hannu.
-
-