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    Date:  9 OCT 1980 1924-EDT
    From: KMP at MIT-MC (Kent M. Pitman)

    On ITS Maclisp, #+(NOT LISPM MACLISP) 3    reads as 3
    		#+(NOT MACLISP LISPM) 3 4  reads as 4
    It just ignores the 2nd element. Syntax checking would be nice.
    Who knows but that someone might not think that #+(NOT a b c ...) means
    the same as #-(AND a b c ...) and lose ...

NOT should only work for one argument.  Anything else is probably a typo.