Step of Proof: not-not-assert 11,40

Inference at * 1 
Iof proof for Lemma not-not-assert:



1. b : 
2. (b)
  b 
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 by (SupposeNot) 
CollapseTHEN (Auto) 
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C.


Definitionsx:AB(x), Dec(P), P  Q, left + right, t  T, A, P  Q, False
Lemmasdecidable assert

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