Step 
*
 of Lemma 
es-latest-val_wf
∀[Info,T:Type]. ∀[X:EClass(T)].  ((X)- ∈ EClass(T))
BY
 
{ ProveWfLemma }
 
Latex: 
Latex:
\mforall{}[Info,T:Type].  \mforall{}[X:EClass(T)].    ((X)\msupminus{}  \mmember{}  EClass(T))
 By 
Latex:
ProveWfLemma
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