diff --git a/doc/plugins/conditional/discussion.mdwn b/doc/plugins/conditional/discussion.mdwn
index e34df70a1..09e3df923 100644
--- a/doc/plugins/conditional/discussion.mdwn
+++ b/doc/plugins/conditional/discussion.mdwn
@@ -4,6 +4,10 @@ Using \[\[!if test="tagged(plugin)" then="= Tagged as plugin =" else="*No plugin
 
 -- Thiana
 
+> This wiki has no page named "plugin", so nothing links to it; tags are a species of link
+> so tagging a large number of pages with a tag that doesn't exist (which change has
+> been reverted) doesn't make the pagespec match. It would if the tag's page existed. --[[Joey]]
+
 ----
 
 Would there be a way for this plugin to emit fewer blank lines (i.e. *none at all*)?