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Mirrors > Home > ILE Home > Th. List > wi | GIF version |
Description: If φ and ψ are wff's, so is (φ → ψ) or "φ implies ψ." 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 (φ → (ψ → χ)), the middle ψ may be informally called either an antecedent or part of the consequent depending on context. |
Ref | Expression |
---|---|
wph | wff φ |
wps | wff ψ |
Ref | Expression |
---|---|
wi | wff (φ → ψ) |
Colors of variables: wff set class |
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