home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!mcsun!news.funet.fi!hydra!klaava!amnell
- From: amnell@klaava.Helsinki.FI (Marko Amnell)
- Newsgroups: sci.math
- Subject: Re: Proof of God's Existence
- Message-ID: <1992Sep1.173025.24959@klaava.Helsinki.FI>
- Date: 1 Sep 92 17:30:25 GMT
- References: <17ui6kINNsft@matt.ksu.ksu.edu>
- Organization: University of Helsinki
- Lines: 42
-
- In article <17ui6kINNsft@matt.ksu.ksu.edu> bubai@matt.ksu.ksu.edu
- (P.Chatterjee) writes:
-
- >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.
-
- 'With pleasure. At least two versions of the ontological proof come to
- mind. First, consider this proof from 'positive properties' attributed
- to Goedel:
-
- Axiom 1. (Dichotomy) A property is positive iff its negation is negative.
- Axiom 2. (Closure) A property is positive if it necessarily contains a
- positive property.
- Theorem 1. A positive property is logically consistent (ie. possibly it
- has some instance).
- Definition. Something is God-like iff it possesses all positive
- properties.
- Axiom 3. Being God-like is a positive property.
- Axiom 4. Being a positive property is (logical, hence) necessary.
- Definition. A property P is the essence of x iff x has P and P is
- necessarily minimal.
- Theorem 2. If x is God-like, then being God-like is the essence of x.
- Definition. NE(x): x necessarily exists if it has an essential
- property.
- Axiom 5. Being NE is God-like.
- Theorem 3. Necessarily there is some x such that x is God-like.
-
- Now, gape at this short modal version by Alvin Plantinga:
- Define 'unsurpassable greatness' to be equivalent to _maximal greatness
- in every possible world_. Then
-
- (1) There is a possible world in which unsurpassable greatness is
- exemplified.
- (2) The proposition <a thing has unsurpassable greatness if and only if
- it has maximal excellence in every possible world> is necessarily
- true.
- (3) The proposition <whatever has maximal excellence is omnipotent,
- omniscient, and morally perfect> is necessarily true.
-
- Try refuting these babies!
-
- Marko Amnell
-