>>> John Boone on Black and White 
 WE> Also note that P xor Q implies P or Q while the reverse is false. 
 JB> The truth tables are not the same.
 JB> P Q  P xor Q  P or Q  PxorQ implies PorQ  PorQ implies PxorQ
 JB> T T     F       T              t                  f
 JB> F T     T       T              t                  t
 JB> T F     T       T              t                  t
 JB> F F     F       F              t                  t
 JB> Binary logic is another term used for Aristotlian logic, 
Two valued logic.
 JB> zeros and ones.  
Binary data.
 JB> From "Fuzzy Logic" by Bart Kosko preface xvi: 
A mathematician?
 JB> Fuzziness has a formal name in science: multivalence. 
 JB> The opposite of fuzziness is BIVALENCE or TWO-valuedness. 
I haven't seem a workable finite multi-valued propositional calculus. have 
you?  Fuzziness uses real numbers does it not?  What's the difference between 
fuzzy logic and fuzzy set theory?  Fuzzy logic seemed like probability while 
fuzzy set theory didn't use the notion of probability, it used the notion of 
degree of inclusion, like light pink, pink, light red, red.
... The double standard:  are not two better than one?
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