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- Newsgroups: sci.math
- Path: sparky!uunet!comp.vuw.ac.nz!cc-server4.massey.ac.nz!TMoore@massey.ac.nz
- From: news@massey.ac.nz (USENET News System)
- Subject: Re: Difference between "show" and "prove"
- Message-ID: <1992Dec17.205056.9294@massey.ac.nz>
- Organization: Massey University
- References: <Bz7KyK.297@ulowell.ulowell.edu> <BzAIMI.Gt@news.cso.uiuc.edu> <1992Dec16.191442.12895@news.Hawaii.Edu> <1992Dec16.195452.29610@u.washington.edu>
- Date: Thu, 17 Dec 92 20:50:56 GMT
- Lines: 18
-
- In article <1992Dec16.195452.29610@u.washington.edu>, mcfarlan@corona.math.washington.edu (Thomas J. McFarlane) writes:
- > A distinction between demonstration and proof can be made as follows.
- > When one is working within an axiomatic system and derives formal
- > consequences of the axioms, this is called a demonstration.
-
- My answer is the opposite. When I exhibit a 3,4,5 triangle and show that
- 3^2 + 4^2 = 5^2, I have demonstrated Pythagoras's theorem. I haven't
- proved it.
-
- As there is no formal international standard for mathematics, who is
- to say who has the best answer.
-
- Terry Moore
-
- P.S. Devil's advocate - "prove" means "test" as in a ship's "proving
- trials". I believe that an exam caused some controversy when the it
- asked for a "proof" of a statement which was false. The examiner said,
- "That's OK, give a counter example and show that the statement fails the test".
-