1 files changed, 0 insertions, 22 deletions
diff --git a/book/examples/chapter6/Nat.gf b/book/examples/chapter6/Nat.gf
deleted file mode 100644
index ba0dfe4a1..000000000
--- a/book/examples/chapter6/Nat.gf
+++ /dev/null
@@ -1,22 +0,0 @@
-abstract Nat = {
-  cat
-    Prop ;                        -- proposition
-    Nat ;                         -- natural number
-  data
-    Zero : Nat ;                  -- 0
-    Succ : Nat -> Nat ;           -- the successor of x
-  fun
-    Even : Nat -> Prop ;          -- x is even
-    And  : Prop -> Prop -> Prop ; -- A and B
-
-  fun one : Nat ;
-  def one = Succ Zero ;
-
-  fun twice : Nat -> Nat ;
-  def twice x = plus x x ;
-
-  fun plus : Nat -> Nat -> Nat ;
-  def 
-    plus x Zero = x ;
-    plus x (Succ y) = Succ (plus x y) ;
-}