On 1 November 2010 11:44, Christine Karman <span dir="ltr">&lt;<a href="mailto:mylists@christine.nl">mylists@christine.nl</a>&gt;</span> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">


  
    
  
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    On 11/01/2010 10:39 AM, Wolfgang Laun wrote:
    <blockquote type="cite">Mostly out of curiosity:<br>
      I have implemented a few things using full-blown backward chaining
      and<br>
      I know that these things could have been implemented just as well
      using<br>
      forward chaining. Therefore: Why does your project &quot;need&quot; bw
      chaining?<br>
    </blockquote>
    <br></div>
    A forward chaining engine finds all premisses and then draws all
    conclusions it can make, recursively. A backward chaining engine
    finds all goals, then tries to satisfy them using available facts.
    If no facts remain and no goal has been satisfied, the system should
    ask a user. A forward chaining engine would never find unsatisfied
    goals, so it would never try to acquire additional information,
    unless you specifically program it to do so. Basically, by doing
    that you build in a backward chaining component.<br>
    <br>
    I have built quite a few expert systems that used both backward
    chaining and forward chaining. Either one wouldn&#39;t have done the
    job. <br>
    <br></div></blockquote><div><br>Indeed, requesting additional facts makes all the difference.<br>Thank you!<br>Wolfgang<br> </div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div bgcolor="#ffffff" text="#000000">
    dagdag<br><font color="#888888">
    Christine</font><div><div></div><div class="h5"><br>
    <br>
    <blockquote type="cite">
      Of course, if you have a good algorithm based on that, it may be
      easier<br>
      to stay with it.<br>
      -W<br>
      <br>
      <div class="gmail_quote">On 1 November 2010 10:15, Christine
        Karman <span dir="ltr">&lt;<a href="mailto:mylists@christine.nl" target="_blank">mylists@christine.nl</a>&gt;</span>
        wrote:<br>
        <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">On 10/29/2010 04:32 PM, Mark Proctor wrote:<br>
          &gt; We have a prototype of BC that works, but won&#39;t be ready
          until Q1 next<br>
          &gt; year.<br>
          Is that in the svn? Is it a separate project in svn, or is it
          part of<br>
          the trunk?<br>
          <br>
          dagdag<br>
          Christine<br>
          &gt; Mark<br>
          &gt;&gt; dagdag<br>
          &gt;&gt; Christine<br>
          &gt;<br>
          &gt; _______________________________________________<br>
          &gt; rules-dev mailing list<br>
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          &gt;<br>
          <font color="#888888"><br>
            <br>
            --<br>
            dagdag is just a two-character rotation of byebye.<br>
            <br>
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dagdag is just a two-character rotation of byebye.
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