Step 
*
 of Lemma 
no-excluded-middle
¬(∀P:ℙ. (P ∨ (¬P)))
BY
 
{ (InstLemma `no-excluded-middle-using-partial` [] THEN Auto) }
 
Latex: 
Latex:
\mneg{}(\mforall{}P:\mBbbP{}.  (P  \mvee{}  (\mneg{}P)))
 By 
Latex:
(InstLemma  `no-excluded-middle-using-partial`  []  THEN  Auto)
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