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Syntax Definition w3o 921
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 (𝜑𝜓𝜒)

See definition df-3or 923 for more information.

Colors of variables: wff set class
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