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Step * of Lemma strict4-ispair

strict4(λx,y,z,w. if x is a pair then y otherwise z)
BY
{ ProveStrict }

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Latex:

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Latex:
strict4(\mlambda{}x,y,z,w.  if  x  is  a  pair  then  y  otherwise  z)


By

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Latex:
ProveStrict

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