diff --git a/TODO.md b/TODO.md
index 59bd427..74b596b 100644
--- a/TODO.md
+++ b/TODO.md
@@ -1,4 +1,9 @@
-# system-a
+# Interlude VI: How the Model Trains
+
+[models] `accurateEnoughIrisTrainParameters`
+[models] `gridSearch`
+
+# Chapter 14 & 15
 
 [neurons] `correlate`
 [neurons] `recu`
@@ -9,16 +14,10 @@
 
 # the-book
 
-[the-book] 15: …But It Is Correlated!
 [the-book] Appendix B: I Could Have Raced All Day
 
 # later
 
-[models] `accurateEnoughIrisTrainParameters`
-[models] `gridSearch`
-
-# later
-
 [neurons] extended `linear` and `matrixVactorMul` to all `Tensor`.
 
 - Is `matrixVactorMul` already extended to all `Tensor`?