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GIF version
Syntax Definition w3o 776
Description: Extend wff definition to include 3-way disjunction ('or').
Hypotheses
Ref Expression
wph wff φ
wps wff ψ
wch wff χ
Assertion
Ref Expression
w3o wff (φ ⋁ ψ ⋁ χ)
See definition df-3or 778 for more information.
Colors of variables: wff set class
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