diff --git a/primer/src/Primer/Eval/Redex.hs b/primer/src/Primer/Eval/Redex.hs
index fb71bdbce..899882798 100644
--- a/primer/src/Primer/Eval/Redex.hs
+++ b/primer/src/Primer/Eval/Redex.hs
@@ -229,8 +229,8 @@ data Redex
       , def :: ASTDef
       -- ^ What is its definition
       }
-  | -- x  ~>  e   where we are inside the scope of a  let x = e in ...
-    InlineLet
+  | -- let x = e in x  ~>  e
+    InlineLet -- TODO/REVIEW: don't know if I want to change this def for push-down-lets, as only inline an immediate usage
       { var :: LVarName
       -- ^ What variable are we inlining
       , expr :: Expr
@@ -240,8 +240,8 @@ data Redex
       , varID :: ID
       -- ^ Where was the occurrence (used for details)
       }
-  | -- x  ~>  letrec x:T=t in t:T   where we are inside the scope of a  letrec x : T = t in ...
-    InlineLetrec
+  | -- letrec x = t : T in x  ~>  letrec x = t : T in t : T
+    InlineLetrec -- TODO/REVIEW: don't know if I want to change this def for push-down-lets, as only inline an immediate usage
       { var :: LVarName
       -- ^ What variable are we inlining
       , expr :: Expr
@@ -428,6 +428,7 @@ data RedexType
       -- ^ What is its definition (used for reduction)
       , letID :: ID
       -- ^ Where was the binding (used for details)
+      -- TODO/REVIEW: it seems a bit silly recording both these IDs, since they'll be right next to each other...
       , varID :: ID
       -- ^ Where was the occurrence (used for details)
       }