Re: [sc] safety language Was:Campaign for Plain English



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From: Peter B. Ladkin (ladkin(at)rvs.uni-bielefeld.de)
Date: Wed 04 Dec 2002 - 17:05:39 GMT


Mike Holloway asks:

     "Condition-A Boolean expression containing no Boolean operators."

     "Decision-A Boolean expression composed of conditions and zero or more
      Boolean operators. A decision without a Boolean operator is a condition. If
      a condition appears more than once in a decision, each occurrence is a
      distinct condition."

      ....... try to use the above entries to determine, how many 'conditions'
      are in the following expression:

      (A and B) or (B and C) or (A and C)

I'll bite. 6.

There is perhaps a problem with the statement "If a condition appears more than
once in a decision, each occurrence is a distinct condition.", for may seem at
first glance to be contradictory. Taken literally, the consequent implies the negation
of the antecedent. But this just implies the consequent simpliciter. It could perhaps
have been more prudently phrased "each occurrence of a condition in a decision
is to count as a distinct condition from other occurrences".

PBL

-- 
Peter B. Ladkin PhD FBCS CW(hon)
Professor of Computer Networks and Distributed Systems,
Faculty of Technology, University of Bielefeld, 33594 Bielefeld, Germany
Tel (Vx/msg/Fax) +49 (0)521 880 7319 http://www.rvs.uni-bielefeld.de

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