diff --git a/packages/squiggle-lang/__tests__/Reducer/Reducer_test.res b/packages/squiggle-lang/__tests__/Reducer/Reducer_test.res
index 85200d27..b138938d 100644
--- a/packages/squiggle-lang/__tests__/Reducer/Reducer_test.res
+++ b/packages/squiggle-lang/__tests__/Reducer/Reducer_test.res
@@ -7,6 +7,7 @@ describe("reducer using mathjs parse", () => {
   // Reducer.parse is called by Reducer.eval
   // See https://mathjs.org/docs/expressions/syntax.html
   // See https://mathjs.org/docs/reference/functions.html
+  // Those tests show that we are converting mathjs parse tree to what we need
 
   describe("expressions", () => {
     test("1", () => expectParseToBe("1", "Ok(1)"))
@@ -49,8 +50,6 @@ describe("eval", () => {
     // TODO more built ins
   })
   describe("arrays", () => {
-    //Note. () is a empty list in Lisp
-    // The only builtin structure in Lisp is list
     test("empty array", () => expectEvalToBe( "[]", "Ok([])"))
     test("[1, 2, 3]", () => expectEvalToBe( "[1, 2, 3]", "Ok([1, 2, 3])"))
     test("['hello', 'world']", () => expectEvalToBe( "['hello', 'world']", "Ok(['hello', 'world'])"))
diff --git a/packages/squiggle-lang/src/rescript/Reducer/Reducer_CodeTree/Reducer_CodeTree_T.res b/packages/squiggle-lang/src/rescript/Reducer/Reducer_CodeTree/Reducer_CodeTree_T.res
index 0c3303e3..16dd635b 100644
--- a/packages/squiggle-lang/src/rescript/Reducer/Reducer_CodeTree/Reducer_CodeTree_T.res
+++ b/packages/squiggle-lang/src/rescript/Reducer/Reducer_CodeTree/Reducer_CodeTree_T.res
@@ -4,4 +4,4 @@ type codeTreeValue = CTV.codeTreeValue
 
 type rec codeTree =
 | CtList(list<codeTree>)  // A list to map-reduce
-| CtValue(codeTreeValue)  // Irreducable built-in value. Reducer should not know the internals. External libraries are responsible
+| CtValue(codeTreeValue)  // Irreducible built-in value. Reducer should not know the internals. External libraries are responsible
diff --git a/packages/squiggle-lang/src/rescript/Reducer/Reducer_Extension/Reducer_Extension_CodeTreeValue.res b/packages/squiggle-lang/src/rescript/Reducer/Reducer_Extension/Reducer_Extension_CodeTreeValue.res
index f7c7ae92..66026dad 100644
--- a/packages/squiggle-lang/src/rescript/Reducer/Reducer_Extension/Reducer_Extension_CodeTreeValue.res
+++ b/packages/squiggle-lang/src/rescript/Reducer/Reducer_Extension/Reducer_Extension_CodeTreeValue.res
@@ -1,5 +1,5 @@
 /*
-  Irreducable values. Reducer does not know about those. Only used for external calls
+  Irreducible values. Reducer does not know about those. Only used for external calls
   This is a configuration to to make external calls of those types
 */
 module AE = Reducer_Extra_Array
diff --git a/packages/squiggle-lang/src/rescript/Reducer/Reducer_MathJs/Reducer_MathJs_Parse.res b/packages/squiggle-lang/src/rescript/Reducer/Reducer_MathJs/Reducer_MathJs_Parse.res
index b899c202..f1097f9a 100644
--- a/packages/squiggle-lang/src/rescript/Reducer/Reducer_MathJs/Reducer_MathJs_Parse.res
+++ b/packages/squiggle-lang/src/rescript/Reducer/Reducer_MathJs/Reducer_MathJs_Parse.res
@@ -8,7 +8,7 @@ module Rerr = Reducer_Error
 
 type reducerError = Rerr.reducerError
 
-type rec node = {
+type node = {
   "type": string,
   "isNode": bool,
   "comment": string
diff --git a/packages/squiggle-lang/src/rescript/Reducer/Reducer_MathJs/Reducer_MathJs_ToCodeTree.res b/packages/squiggle-lang/src/rescript/Reducer/Reducer_MathJs/Reducer_MathJs_ToCodeTree.res
index 14921ee8..815f12f6 100644
--- a/packages/squiggle-lang/src/rescript/Reducer/Reducer_MathJs/Reducer_MathJs_ToCodeTree.res
+++ b/packages/squiggle-lang/src/rescript/Reducer/Reducer_MathJs/Reducer_MathJs_ToCodeTree.res
@@ -9,18 +9,6 @@ type codeTree = CTT.codeTree
 type codeTreeValue = CTV.codeTreeValue
 type reducerError = Rerr.reducerError
 
-// TODO:
-// AccessorNode
-// AssignmentNode
-// BlockNode
-// ConditionalNode
-// FunctionAssignmentNode
-// IndexNode
-// ObjectNode
-// RangeNode
-// RelationalNode
-// SymbolNode
-
 let rec fromNode =
   (mjnode: MJ.node): result<codeTree, reducerError> =>
     MJ.castNodeType(mjnode) -> Result.flatMap(typedMjNode => {