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Step * of Lemma bor_ff_simp

∀[u:𝔹]. u ∨bff = u
BY
{ ((UnivCD THENM BoolEval) THEN Auto) }

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Latex:

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Latex:
\mforall{}[u:\mBbbB{}].  u  \mvee{}\msubb{}ff  =  u


By

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Latex:
((UnivCD  THENM  BoolEval)  THEN  Auto)

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