[PATCH] Re: [linux-elitists] ssh hygiene
Seth David Schoen
Wed May 1 22:51:54 PDT 2002
Seth David Schoen writes:
> "Not both" is "At least not one, or not the other".
> "Neither of them" is "Not this one, and not that one either".
This important property of Boolean algebra is called
the duality principle. It states that every algebraic
expression deducible from the postulates of Boolean
algebra remains valid if the operators and identity
elements are interchanged. [...] If the dual of an
algebraic expression is desired, we simply interchange
OR and AND operators and replace 1's by 0's and 0's
Mano, _Digital Design_, 2nd ed., p. 41.
Seth David Schoen <firstname.lastname@example.org> | Reading is a right, not a feature!
http://www.loyalty.org/~schoen/ | -- Kathryn Myronuk
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