diff --git a/content/notes/the-art-of-war.md b/content/notes/the-art-of-war.md
index 41e77ca59..a933f4795 100644
--- a/content/notes/the-art-of-war.md
+++ b/content/notes/the-art-of-war.md
@@ -5,5 +5,6 @@ tags:
 - book
 ---
 
+# 1 Estimates