Re: [ontolog-forum] The Open world assumption shoe does not always fit - was: RE: Fwd: Ontolog invited speaker session - Dr. Mark Greaves on the Halo Project - Thu 2008.06.19

2008-06-27 Thread John F. Sowa
I just wanted to add some comments that I forgot to make in my previous note in this thread. Following is what I did say: There are also many cases where a metalevel reasoner can make orders of magnitude *improvement* in performance at the object level. Among them are various kinds

Re: [ontolog-forum] The Open world assumption shoe does not always fit - was: RE: Fwd: Ontolog invited speaker session - Dr. Mark Greaves on the Halo Project - Thu 2008.06.19

2008-06-27 Thread Toby Considine
Date had it right. NULL is neither true nor false. The most fundamental problem of constructing any kind of knowledge in a space as large as the internet is heterogeneity. The most fundamental strength when working with heterogeneity is knowing what you don't know. If I remember anything from

Re: [ontolog-forum] The Open world assumption shoe does not always fit - was: RE: Fwd: Ontolog invited speaker session - Dr. Mark Greaves on the Halo Project - Thu 2008.06.19

2008-06-27 Thread Pat Hayes
At 10:57 AM -0400 6/27/08, Toby Considine wrote: As a new-comer in the semantic space, what is CL, where should I start to read on it. Sorry. Common Logic (CL) is a recent ISO standard http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=39175 which defines a

Re: [ontolog-forum] The Open world assumption shoe does not always fit - was: RE: Fwd: Ontolog invited speaker session - Dr. Mark Greaves on the Halo Project - Thu 2008.06.19

2008-06-27 Thread Pat Hayes
At 9:37 AM -0400 6/27/08, Adrian Walker wrote: Pat, John, Chimeze and all -- Illuminating discussion. FWIW, all my replies to three of the groups in your CC line get rejected, so somebody is only getting half the story :-) Two points: 1. If you move to from SQL-like NAF reasoning, to full