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Step * of Lemma eu-colinear-switch3

∀e:EuclideanPlane. ∀a,b,c:Point.  ((¬(c = b ∈ Point)) ⇒ Colinear(a;b;c) ⇒ Colinear(c;b;a))
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Latex:

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Latex:
\mforall{}e:EuclideanPlane.  \mforall{}a,b,c:Point.    ((\mneg{}(c  =  b))  {}\mRightarrow{}  Colinear(a;b;c)  {}\mRightarrow{}  Colinear(c;b;a))


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