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Syntax Definition w-bnj17 32041
Description: Extend wff notation with the 4-way conjunction. (New usage is discouraged.)
Ref Expression
wph wff 𝜑
wps wff 𝜓
wch wff 𝜒
wth wff 𝜃
Ref Expression
w-bnj17 wff (𝜑𝜓𝜒𝜃)

See definition df-bnj17 32042 for more information.

Colors of variables: wff setvar class
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