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Step * of Lemma left-all-symmetry

∀g:EuclideanPlane. ∀a,b,c:Point.  (a leftof bc ⇒ {b leftof ca ∧ c leftof ab})
BY
{ (Unfold `guard` 0 THEN Auto THEN EAuto 1) }

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Latex:

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Latex:
\mforall{}g:EuclideanPlane.  \mforall{}a,b,c:Point.    (a  leftof  bc  {}\mRightarrow{}  \{b  leftof  ca  \mwedge{}  c  leftof  ab\})


By

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Latex:
(Unfold  `guard`  0  THEN  Auto  THEN  EAuto  1)

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