diff --git a/winnertakeall/internal-excitation.md b/winnertakeall/internal-excitation.md
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--- a/winnertakeall/internal-excitation.md
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@@ -1,3 +1,7 @@
+---
+include_toc: true
+---
+
 # internal-excitation.md
 
 ## INTERNAL-EXCITATION: Tuner