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Axiom ax-weak 51
Description: ? 𝜑 can be added into any statement.
Assertion
Ref Expression
ax-weak (~ ⊥ ⅋ ? 𝜑)

Detailed syntax breakdown of Axiom ax-weak
StepHypRef Expression
1 wbot 1 . . 3 wff
21wneg 3 . 2 wff ~ ⊥
3 wph . . 3 wff 𝜑
43wne 48 . 2 wff ? 𝜑
52, 4wmd 2 1 wff (~ ⊥ ⅋ ? 𝜑)
Colors of variables: wff var nilad
This axiom is referenced by: (None)
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