Step * 1 1 1 1 of Lemma geo-perp-in-iff

.....assertion..... 
1. BasicGeometry
2. Point
3. Point
4. Point
5. a ≠ b
⊢ a ≠ x ∨ x ≠ b
BY
((InstLemma `geo-sep-or` [⌜e⌝;⌜a⌝;⌜b⌝;⌜x⌝]⋅ THENM ParallelLast) THEN Auto) }


Latex:


Latex:
.....assertion..... 
1.  e  :  BasicGeometry
2.  a  :  Point
3.  b  :  Point
4.  x  :  Point
5.  a  \mneq{}  b
\mvdash{}  a  \mneq{}  x  \mvee{}  x  \mneq{}  b


By


Latex:
((InstLemma  `geo-sep-or`  [\mkleeneopen{}e\mkleeneclose{};\mkleeneopen{}a\mkleeneclose{};\mkleeneopen{}b\mkleeneclose{};\mkleeneopen{}x\mkleeneclose{}]\mcdot{}  THENM  ParallelLast)  THEN  Auto)




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