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- Newsgroups: comp.object
- Path: sparky!uunet!mole-end!mat
- From: mat@mole-end.matawan.nj.us
- Subject: Re: Equality
- Message-ID: <1992Dec25.074620.20411@mole-end.matawan.nj.us>
- Summary: What means `equal' ? Does Equal == Sugar Twin (on the bedpost overnight)
- Organization: :
- Date: Fri, 25 Dec 1992 07:46:20 GMT
- Lines: 31
-
- References: <1992Dec21.184405.2215@midway.uchicago.edu> <knight.725232043@cunews>
-
- In article <knight.725232043@cunews>, knight@mrco.carleton.ca (Alan Knight) writes:
-
- > I think that you are trying to take a very strong definition of
- > equality that can work for some mathematical abstractions and apply it
- > to everything. I don't think this definition of equality is universal
- > in mathematics either. One often refers to two sides of a triangle
- > being equal, meaning that their lengths are equal. I, and others, have
- > already mentioned graphs.
-
- I seem to recall that that notion of `equality' was called `congruence'.
-
- And perhaps there is a lesson in that: given that all of these things
- are models (where a model is an abstraction expressed in a representation)
- we have to ask whether we mean
-
- equivalence-in-use of the thing abstracted, whatever
- it or they be,
-
- or equivalence-in-structure of the representation,
-
- or even unique identity of the representation.
-
- This is rather like the opening scene of _The Hobbit_, when Bilbo says
- ``Good Morning!'' and Gandalf answers ``What do you mean by that?''
- --
- (This man's opinions are his own.)
- From mole-end Mark Terribile
-
- mat@mole-end.matawan.nj.us, Somewhere in Matawan, NJ
-