diff --git a/boom.hs b/boom.hs
index 3bacdb0..7bfb0f8 100644
--- a/boom.hs
+++ b/boom.hs
@@ -69,43 +69,18 @@ class BoomOrNum n r | n -> r
 instance (Map EqualThree' n bs, AnyTrue bs a, Boom' a n r)
    => BoomOrNum n r
 
-data Nil
-data Cons x xs
-
-class First list x | list -> x
-instance First Nil Nil
-instance First (Cons x more) x
-
-class ListConcat a b c | a b -> c
-instance ListConcat Nil x x
-instance (ListConcat as bs cs)
-   => ListConcat (Cons a as) bs (Cons a cs)
-
-class ListConcatAll ls l | ls -> l
-instance ListConcatAll Nil Nil
-instance (ListConcat chunk acc result,
-          ListConcatAll rest acc)
-   => ListConcatAll (Cons chunk rest) result
-
 class AnyTrue list t | list -> t
 instance AnyTrue Nil False
 instance AnyTrue (Cons True more) True
 instance (AnyTrue list t)
    => AnyTrue (Cons False list) t
 
+data Nil
+data Cons x xs
+
 data True
 data False
 
-class Not b1 b | b1 -> b
-instance Not False True
-instance Not True False
-
-class Or b1 b2 b | b1 b2 -> b
-instance Or True True True
-instance Or True False True
-instance Or False True True
-instance Or False False False
-
 data Z
 data S n
 
@@ -116,13 +91,6 @@ instance Equal Z (S b) False
 instance (Equal a b t)
    => Equal (S a) (S b) t
 
-class LessThan a b t | a b -> t
-instance LessThan Z Z False
-instance LessThan (S x) Z False
-instance LessThan Z (S x) True
-instance (LessThan a b t)
-   => LessThan (S a) (S b) t
-
 class Add x y z | x y -> z
 instance Add x Z x
 instance Add Z y y