[Nmh-workers] Ancient Mistake: Sequences Should Have Been Called Sets

The sequence '1 1' is the same as the sequence '1'
The sequence '1 2' is the same as the sequence '2 1'.
Thus sequences behave as what are normally called sets, not as what are
normally  called sequences.

Of course, it is way, way too late to correct this three decade old mistake, a
mistake for which I share some blame.

    Norman Shapiro
    798 Barron Avenue
    Palo Alto CA 94306-3109
    (650) 565-8215
    norm(_at_)dad(_dot_)org

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