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==Transitional remarks==
 
==Transitional remarks==
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'''Temporary Note.''' The remainder of this discussion uses the syntax for propositional calculus that is described in the entry on [[minimal negation operator]]s.  Logical negation is written by enclosing an expression in parentheses, for example, <math>(x)\!</math> is <math>\lnot x.\!</math>  Logical conjunction is written by concatenating expressions in the manner of algebraic products, for example, <math>x\ y\ z\!</math> is <math>x \land y \land z.\!</math>  For the time being, further details can be found in the entry just mentioned.
    
==Formal development==
 
==Formal development==
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