<div dir="auto">Steve,<div dir="auto"><br></div><div dir="auto">I'm surprised you didn't find any posts by me in your search for "causality" . Usually, when someone says "correlation is not causation" it triggers me. In the early 90s/late 80s there were two teams working on inference of causal graphs from observational data: Pearl et al at UCLA and Glymour et al at Carnegie Mellon. They cooperated and developed algorithms based on d-separation which was based on conditional independence relations (correlation). Glymour et al's book is "Causation, Prediction and Search". I implemented many algorithms in Java for that group over a period of about 10 years and I was co-author of several papers.</div><div dir="auto"><br></div><div dir="auto">Sorry for the narcissistic reaction.</div><div dir="auto"><br></div><div dir="auto">Frank<br><br><div data-smartmail="gmail_signature" dir="auto">---<br>Frank C. Wimberly<br>140 Calle Ojo Feliz, <br>Santa Fe, NM 87505<br>505 670-9918<br>Santa Fe, NM</div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Apr 19, 2020, 6:26 AM Steven A Smith <<a href="mailto:sasmyth@swcp.com">sasmyth@swcp.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<p>Glen -</p>
<p>I'm in the midst (early part) of Judea Pearl's "Book of Why". <br>
</p>
<p>I had a vague memory of his earlier book: "Causality" having been
referenced if not discussed on this list. Searching the
archives, I discovered what I considered to be quite a Pearl (NPI)
circa 2013. In this long chain, you recommended Pearl's
"Causality" which I now wish I had followed up on then. <br>
</p>
<p><a href="http://friam.471366.n2.nabble.com/beyond-reductionism-twice-td7582273i20.html#a7582308" target="_blank" rel="noreferrer">http://friam.471366.n2.nabble.com/beyond-reductionism-twice-td7582273i20.html#a7582308</a></p>
<p>Among the many gems in the thread were the voices of two of our
deceased members, Doug Roberts and Tory Hughes. Doug coined one
of his classic lines about (paraphrase) "being violently
disinterested in the philosophy of causation" (or complexity or
agent-based-model-design).<br>
</p>
<p>After Nick's recent "violent disinterest in the Cult of Feynman"
and in particular to any quote that might imply that birds are
(paraphrase) "not first-class-citizens who would in fact be
interested in ornithology, if they were given access to it", my
eyes caught on your own quote (in 2013) of S. Ulam:</p>
<p><span style="color:rgb(0,0,0);font-family:Verdana,Geneva,Helvetica,Arial,sans-serif;font-size:13.44px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"> "Talking about non-linear mathematics is like
talking about non-elephant</span><br style="color:rgb(0,0,0);font-family:Verdana,Geneva,Helvetica,Arial,sans-serif;font-size:13.44px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial">
<span style="color:rgb(0,0,0);font-family:Verdana,Geneva,Helvetica,Arial,sans-serif;font-size:13.44px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial"> zoology." -- Stanislaw Ulam</span></p>
<p><span style="color:rgb(0,0,0);font-family:Verdana,Geneva,Helvetica,Arial,sans-serif;font-size:13.44px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial">- Steve (176)<br>
</span></p>
<blockquote type="cite">
<pre>
</pre>
<blockquote type="cite">
<pre>Unfortunately, after a couple of attempts to read it, I couldn't understand anything in your post except this part. My previous post was just under 300 words. So, I decided to try to make the next one under that mark as well.
On 4/18/20 1:22 PM, Steven A Smith wrote:
</pre>
<blockquote type="cite">
<pre>From whence (or wherest?) did you get your 300 word target?
</pre>
</blockquote>
</blockquote>
<pre>
you might not be alone in that... perhaps it was just gibberish. And likely more than three hundred words of it.
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