From jcowan@reutershealth.com Tue Aug 21 08:59:19 2001
Return-Path: <jcowan@reutershealth.com>
X-Sender: jcowan@reutershealth.com
X-Apparently-To: lojban@yahoogroups.com
Received: (EGP: mail-7_3_1); 21 Aug 2001 15:59:19 -0000
Received: (qmail 73504 invoked from network); 21 Aug 2001 15:54:08 -0000
Received: from unknown (10.1.10.27)
  by l10.egroups.com with QMQP; 21 Aug 2001 15:54:08 -0000
Received: from unknown (HELO mail.reutershealth.com) (204.243.9.36)
  by mta2 with SMTP; 21 Aug 2001 15:54:08 -0000
Received: from reutershealth.com (IDENT:cowan@[192.168.3.11])
  by mail.reutershealth.com (Pro-8.9.3/Pro-8.9.3) with ESMTP id LAA05834;
  Tue, 21 Aug 2001 11:55:57 -0400 (EDT)
Message-ID: <3B8283EE.5060506@reutershealth.com>
Date: Tue, 21 Aug 2001 11:53:18 -0400
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:0.9.3) Gecko/20010801
X-Accept-Language: en-us
MIME-Version: 1.0
To: And Rosta <arosta@uclan.ac.uk>
Cc: lojban <lojban@yahoogroups.com>, nicholas <nicholas@uci.edu>
Subject: Re: [lojban] Retraction, Part 1
References: <sb82741e.002@gwise-gw1.uclan.ac.uk>
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit
From: John Cowan <jcowan@reutershealth.com>

And Rosta wrote:

> I must admit I haven't come across an exposition of the iota operator
> such that I have understood exactly what it is.

It is +veridical -definite -specific +singular: \iota x p(x) = "the one
x such that p(x) is true (or nothing if there is no such x)".

Russell's example: \iota x (x wrote _Waverly_) means "the (unique)
author of _Waverly_" and refers to Walter Scott.

Typographical note: the iota is rotated 180 degrees.

-- 
Not to perambulate || John Cowan <jcowan@reutershealth.com>
the corridors || http://www.reutershealth.com
during the hours of repose || http://www.ccil.org/~cowan
in the boots of ascension. \\ Sign in Austrian ski-resort hotel


