Step
*
of Lemma
disjoint-classrel_wf
∀[Info,A,B:Type]. ∀[X:EClass(A)]. ∀[Y:EClass(B)]. ∀[es:EO+(Info)].  (disjoint-classrel(es;A;X;B;Y) ∈ ℙ)
BY
{ ProveWfLemma }
Latex:
\mforall{}[Info,A,B:Type].  \mforall{}[X:EClass(A)].  \mforall{}[Y:EClass(B)].  \mforall{}[es:EO+(Info)].
    (disjoint-classrel(es;A;X;B;Y)  \mmember{}  \mBbbP{})
By
ProveWfLemma
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