From 296075ec96d7788c0cf598e0ac24ef2de8b4a3a4 Mon Sep 17 00:00:00 2001
From: Christian Decker <decker.christian@gmail.com>
Date: Thu, 1 Dec 2016 11:20:45 +0100
Subject: [PATCH] glossary: Added the _it's ok to be odd_ rule

---
 00-introduction.md | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/00-introduction.md b/00-introduction.md
index 56c9ba9..ac1010f 100644
--- a/00-introduction.md
+++ b/00-introduction.md
@@ -104,6 +104,11 @@ This is version 0.
    * An 8 byte globally unique identifier for the *funding transaction*
          (and thus for the channel).
 
+* *It's ok to be odd*:
+   * A rule applied to some numeric fields that indicates optional and
+     compulsory support for features. Even numbers indicate that both endpoints
+     MUST support the feature in question, while odd numbers indicate
+     that the feature MAY be disregarded by the other endpoint.
 
 ## Theme Song