Step
*
of Lemma
FormExists-body_wf
∀[C:Type]. ∀[v:Form(C)].  FormExists-body(v) ∈ Form(C) supposing ↑FormExists?(v)
BY
{ DepprodCoDatatypeSelectorWf }
Latex:
Latex:
\mforall{}[C:Type].  \mforall{}[v:Form(C)].    FormExists-body(v)  \mmember{}  Form(C)  supposing  \muparrow{}FormExists?(v)
By
Latex:
DepprodCoDatatypeSelectorWf
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