Article View: sci.logic
Article #6Re: Are all crows black?
From: Christopher Gidman
Date: Tue, 27 Oct 1992 16:50
Date: Tue, 27 Oct 1992 16:50
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In article <1992Oct24.135558.15100@oracorp.com> daryl@oracorp.com (Daryl McCullough) writes: > >In terms of falsification, you could just as well have said "All >non-black things are non-crows". In this form, to test the theory, you >would look for a non-black thing which is not a non-crow. Getting rid >of the double-negatives, once again we find that we are looking for >a non-black crow. > Or, I suppose, you could look for something which is not a non-black thing which is a non-crow. That is looking for a black non-crow. But this doesn't work either. Why not? Christopher.
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Path: arc1-ca.pugleaf.net!sparky!uunet!pipex!unipalm!uknet!doc.ic.ac.uk!aixssc.uk.ibm.com!yktnews!admin!newsgate.watson.ibm.com!news.ans.net!europa.asd.contel.com!paladin.american.edu!darwin.sura.net!spool.mu.edu!news.nd.edu!mentor.cc.purdue.edu!sage.cc.purdue.edu!gidmancj From: gidmancj@sage.cc.purdue.edu (Christopher Gidman) Newsgroups: sci.logic,sci.physics Subject: Re: Are all crows black? Message-ID: <BwsHGt.G22@mentor.cc.purdue.edu> Date: 27 Oct 92 16:50:51 GMT References: <1992Oct24.135558.15100@oracorp.com> Sender: news@mentor.cc.purdue.edu (USENET News) Organization: Purdue University Computing Center Lines: 15