Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!bloom-beacon!mit-eddie!uw-beaver!cornell!rochester!pt.cs.cmu.edu!andrew.cmu.edu!ap1i+ From: ap1i+@andrew.cmu.edu (Andrew C. Plotkin) Newsgroups: comp.ai Subject: Re: Natural Paradox Message-ID: <0XvA3xy00Xoj82iV53@andrew.cmu.edu> Date: 5 Feb 89 21:47:41 GMT References: <1706@tank.uchicago.edu> <9526@ihlpb.ATT.COM> , <2053@buengc.BU.EDU> Organization: Class of '92, Carnegie Mellon, Pittsburgh, PA Lines: 12 In-Reply-To: <2053@buengc.BU.EDU> />/ It would be very interesting, though, to see a statement which />/ was 'provable' yet not 'provable' that it's 'provable.' /> />How would you know it if you saw it? If you could point at it and say "That />statement is provable, but you can't prove it!" how would you know that the />first part of the claim is true, without invalidating the second part? / /Remember Rolle's theorem? No. Clarify? --Z