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<div class="moz-cite-prefix">On 11/29/21 12:04 PM,
<a class="moz-txt-link-abbreviated" href="mailto:thompnickson2@gmail.com">thompnickson2@gmail.com</a> wrote:<br>
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<p class="MsoNormal">Steve, Is there any difference between a
sequential dynamic system and a causal system, or is the
former a species of the latter? <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Just trying to get the words straight. </p>
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I can't say for sure.<br>
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<p>SDS's are definitely in the class of "causal systems" in general
sense of the term. Wikipedia's definition of "causal system" was
a little perplexing insomuch as it defined same more in terms of
not being "acausal" or "anticausal". I have some intuitions
about what the latter might mean but would probably continue to
muddy the water by trying. It seems relevant that the wikipedia
entry for anticausal systems refers to them as "hypothetical"?</p>
<p><a class="moz-txt-link-freetext" href="https://en.wikipedia.org/wiki/Anticausal_system">https://en.wikipedia.org/wiki/Anticausal_system</a><br>
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<p>The point of SDS's are that they are a fairly general, subsuming,
*formal* description (with computer-based implementations) of
causal systems.<br>
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