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Step * of Lemma is-list-btrue-if-list

∀[t:Top List]. (is-list(t) ~ tt)
BY
{ xxx(InductionOnList THEN RecUnfold `is-list` 0 THEN Reduce 0 THEN RepUR ``cons`` 0 THEN Auto)xxx }

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Latex:

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Latex:
\mforall{}[t:Top  List].  (is-list(t)  \msim{}  tt)


By

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Latex:
xxx(InductionOnList  THEN  RecUnfold  `is-list`  0  THEN  Reduce  0  THEN  RepUR  ``cons``  0  THEN  Auto)xxx

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