Step of Proof: sq_stable_iff_stable 12,41

Inference at * 1 
Iof proof for Lemma sq stable iff stable:



1. P : 
2. SqStable(P)
  Stable{P
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 by ((UnfoldTopAb 2) 
CollapseTHEN (UnfoldTopAb 0)) 
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C1

C1: 2. (P P
C1:   (P P
C.


DefinitionsStable{P}, SqStable(P)

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