Step 
*
 of Lemma 
lifting2-like_wf
∀[A,B,C:Type]. ∀[f:bag(A) ─→ bag(B) ─→ bag(C)].  (lifting2-like(A;B;f) ∈ ℙ)
BY
 
{ ProveWfLemma }
 
Latex: 
Latex:
\mforall{}[A,B,C:Type].  \mforall{}[f:bag(A)  {}\mrightarrow{}  bag(B)  {}\mrightarrow{}  bag(C)].    (lifting2-like(A;B;f)  \mmember{}  \mBbbP{})
 By 
Latex:
ProveWfLemma
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