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To: lojban-list@snark.thyrsus.com
Cc: Arthur Hyun <ash@rpi.edu>
Subject: Set in extension (was: Nick tries valiantly...)
In-Reply-To: Your message of "Tue, 23 Apr 91 04:38:18 EDT."
             <9104230839.AA01500@its.rpi.edu> 
Date: Tue, 23 Apr 91 10:45:55 -0700
Status: RO
X-From-Space-Date: Tue Apr 23 21:31:39 1991
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> Date:  Tue, 23 Apr 91 04:38:18 -0400
> To:  lojban-list@snark.thyrsus.com
> From:  Arthur Hyun <ash@rpi.edu>
> Subject:  Re: Nick tries valiantly to save face (His first sentence) 
   
> * * *
> Perhaps I have a different idea of what a "set" is?  I don't really
> see how "mi lojbo jufra" is not a set, as it could be plural; that
> is, "my lojbanic-type-of sentences".  If this were the case, then
> it seems to me that it is, actually, a set--a set of those sentences
> of mine which are "lojbanic-type".

The distinction is between a set as a set, and a set in extension.  In
extension, the sentence is replicated once for each referent and the
effect is as if you had said N sentences about N individual referents. 
In selection from a list, on the other hand, the referents have to
remain together as a set.  

		-- jimc