From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Thu, 8 Mar 2012 16:21:33 +0000 (+0000)
Subject: wip merge complex - a bug
X-Git-Tag: f0.2~129
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?p=topbloke-formulae.git;a=commitdiff_plain;h=4bdffaf2a0fe8fdd585221aa2e43171028deca7b

wip merge complex - a bug
---

diff --git a/article.tex b/article.tex
index be767aa..b2f943b 100644
--- a/article.tex
+++ b/article.tex
@@ -598,4 +598,23 @@ $D \in \pancsof{X}{\py}$, so by Merge Ends and
 Transitive Ancestors $D \le Y$ --- a contradiction, so $D \not\le X$.
 Thus $D \not\le C$.  By $\merge$, $D \not\isin C$.  OK.
 
+Consider $D \neq C, M \haspatch P, D \isin Y$:
+$D \le Y$ so $D \le M$
+
+%anyway     D \not\isin X
+%           D \isin Y
+%           D \le Y
+
+%bad case
+%           D \not\le M
+%           D \not\isin M
+% results
+%           D \isin C    wrong
+
+%ok case
+%           D \le M
+%           D \isin M
+% results
+%           D \not\isin C  OK
+
 \end{document}