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I&rsquo;ve mentioned this to newsletter subscribers, but it occurs to me that I&rsquo;ve not said anything here in the online notebook — autumn is here, and the annual closedown is at hand . If you&rsquo;ve read this site for a while, you might recall that it tends to follow a certain rhythm: I&rsquo;m online when the Chicago Cubs are playing baseball. I&rsquo;ve made several attempts to explain…