x : Nat ⊢ foo x = 10 x : Nat ⊢ foo x = 10 x : Nat ⊢ foo x = 10 x : Nat ⊢ foo x = 10 x : Nat ⊢ foo x = 10 x : Nat ⊢ foo x = 10 x : Nat ⊢ boo x x : Nat ⊢ boo x x : Nat ⊢ boo x x : Nat ⊢ boo x