Step 
*
 of Lemma 
dist-sep_wf
∀[g:EuclideanPlane]. ∀[a,b:Point].  (Dsep(g;a;b) ∈ ℙ)
BY
 
{ ProveWfLemma }
 
Latex: 
Latex:
\mforall{}[g:EuclideanPlane].  \mforall{}[a,b:Point].    (Dsep(g;a;b)  \mmember{}  \mBbbP{})
 By 
Latex:
ProveWfLemma
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