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Syntax Definition wi 4
Description: If  ph and  ps are wff's, so is  (
ph  ->  ps ) or " ph implies  ps." Part of the recursive definition of a wff. The left-hand wff is called the antecedent, and the right-hand wff is called the consequent. In the case of  ( ph  ->  ( ps  ->  ch )
), the middle  ps may be informally called either an antecedent or part of the consequent depending on context.
Hypotheses
Ref Expression
wph  wff  ph
wps  wff  ps
Assertion
Ref Expression
wi  wff  ( ph  ->  ps )

This syntax is primitive. The first axiom using it is ax-1 6.

Colors of variables: wff set class
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