Step
*
of Lemma
or-quotient-true-subtype
∀P:ℙ. (⇃(P ∨ (¬P)) ⊆r (⇃(P) ∨ ⇃(¬P)))
BY
{ Auto }
Latex:
Latex:
\mforall{}P:\mBbbP{}.  (\00D9(P  \mvee{}  (\mneg{}P))  \msubseteq{}r  (\00D9(P)  \mvee{}  \00D9(\mneg{}P)))
By
Latex:
Auto
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