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From: gordon@warwick.UUCP
Newsgroups: comp.ai
Subject: Explanation and Justification.
Message-ID: <421@euclid.warwick.UUCP>
Date: Mon, 23-Mar-87 10:22:32 EST
Article-I.D.: euclid.421
Posted: Mon Mar 23 10:22:32 1987
Date-Received: Thu, 26-Mar-87 06:13:13 EST
Reply-To: gordon@euclid.UUCP (Gordon Joly)
Organization: Maths Institute, Warwick University, UK
Lines: 8

In answer to the question "does an expert system need to
be able to explain itself to be useful", consider teaching.
Anyone who has taught knows, to teach something (ie to explain
it to a class), you really need to understand the issues, 
before you can begin to get them across. Also, in the process
of teaching itself, ones own understanding is often deepened.

Gordon Joly -- {seismo,ucbvax,decvax}!mcvax!ukc!warwick!gordon