>>>>> "Andrew" == Andrew Hume <[EMAIL PROTECTED]> writes:

  Andrew> i guess we'll see.  obviously, you DON'T need time to
  Andrew> represent change.  in fact, the preferred mechanism is
  Andrew> normally a state change in an FSM.  time, because of its
  Andrew> other properties, tends to confuse the issue (mostly by
  Andrew> humans who bring a fair bit of baggage with it).

  Andrew> but the FSM story is another tale.

You're absolutely right; time doesn't need to be included as an
independent variable in order to represent change. It needs to be
encoded somewhere so that you can understand what happened. I find
that this is where things get mushy; getting administrators
comfortable with what is going on is the tricky part...
 -nld
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