diff --git a/notes/blog_posts/org_mode/notes.org b/notes/blog_posts/org_mode/notes.org
index 6715c72..d61dd24 100644
--- a/notes/blog_posts/org_mode/notes.org
+++ b/notes/blog_posts/org_mode/notes.org
@@ -6,3 +6,7 @@ They have different precedent despite identical values
 ** Invisible, non-typeable escape character
 ** Why not use the invisible escape character for the special case of entities
 entities use ={}= to escape the end of an entity but the invisible non-typeable escape character used everywhere else would have worked here too.
+* Comparison to other formats
+** Markdown
+*** Critique of markdown
+http://schwarze.bsd.lv/1703_mandoc_markdown.7