Step
*
of Lemma
dl-or-2_wf
∀[x:Prop]. dl-or-2(x) ∈ Prop supposing ↑dl-or?(x)
BY
{ MrecSelectorWf dlElim }
Latex:
Latex:
\mforall{}[x:Prop].  dl-or-2(x)  \mmember{}  Prop  supposing  \muparrow{}dl-or?(x)
By
Latex:
MrecSelectorWf  dlElim
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