diff --git a/src/Quox/Eval.idr b/src/Quox/Eval.idr
deleted file mode 100644
index 0e3e878..0000000
--- a/src/Quox/Eval.idr
+++ /dev/null
@@ -1,130 +0,0 @@
-module Quox.Eval
-
--- todo list:
--- - understand nbe and use it
--- - take a proof of well-typedness as an argument,
---   to reduce the number of eithers
--- - remove the either if possible (should be???)
-
-import Quox.Syntax
-import Quox.Context
-
-import Data.DPair
-import Data.SortedMap
-
-%default total
-
-
-public export
-record Global where
-  constructor G
-  val : forall d, n. NotCloElim d n
-
-public export Globals : Type
-Globals = SortedMap Name Global
-
-export (!!) : Globals -> Name -> Maybe (Elim d n)
-gs !! x = map (\g => g.val.fst) $ lookup x gs
-  -- just `map (fst . val)` fails?
-
-
-mutual
-  public export isValue : Term d n -> Bool
-  isValue (TYPE {})          = True
-  isValue (Pi {arg, res, _}) = isValue arg && isValue res
-  isValue (Lam {body, _})    = isValue body
-  isValue (E e)              = isNeutral e
-  isValue (CloT  {})         = False
-  isValue (DCloT {})         = False
-
-  public export isNeutral : Elim d n -> Bool
-  isNeutral (F {})       = False
-  isNeutral (B {})       = True
-  isNeutral (fun :@ arg) = isNeutral fun && isValue arg
-  isNeutral (_ :# _)     = False
-  isNeutral (CloE {})    = False
-  isNeutral (DCloE {})   = False
-
-public export IsValue : Term d n -> Type
-IsValue = So . isValue
-
-public export IsNeutral : Elim d n -> Type
-IsNeutral = So . isNeutral
-
-public export Value : Nat -> Nat -> Type
-Value d n = Subset (Term d n) IsValue
-
-public export Neutral : Nat -> Nat -> Type
-Neutral d n = Subset (Elim d n) IsNeutral
-
-public export valT : (t : Term d n) -> (0 _ : IsValue t) => Value d n
-valT t = Element t %search
-
-public export neuE : (e : Elim d n) -> (0 _ : IsNeutral e) => Neutral d n
-neuE e = Element e %search
-
-
-data EvalError =
-    NotInScope Name
-  | NonFunction SomeElim
-
-
-parameters (globals : Globals)
-  mutual
-    export covering %inline
-    evalT : Term d n -> Either EvalError (Value d n)
-    evalT = uncurry evalT' . pushSubstsT
-
-    export covering %inline
-    evalE : Elim d n -> Either EvalError (Neutral d n)
-    evalE = uncurry evalE' . pushSubstsE
-
-    export covering
-    evalT' : (t : Term d n) -> (0 prf : IsNotCloT t) ->
-             Either EvalError (Value d n)
-
-    export covering
-    evalE' : (e : Elim d n) -> (0 prf : IsNotCloE e) ->
-             Either EvalError (Neutral d n)
-
-
-public export
-data AlphaResult =
-    Ok
-  | Clash  SomeTerm SomeTerm
-  | DClash SomeDim  SomeDim
-  | QClash Qty      Qty
-
-export
-Semigroup AlphaResult where
-  Ok  <+> res = res
-  res <+> _   = res
-
-export Monoid AlphaResult where neutral = Ok
-
-private %inline clash : Term d1 n1 -> Term d2 n2 -> AlphaResult
-clash s t = Clash (some2 s) (some2 t)
-
-
-||| check two quantities are exactly equal and fail if not
-export %inline
-alphaQ : (pi, rh : Qty) -> AlphaResult
-alphaQ pi rh = if pi == rh then Ok else QClash pi rh
-
-export %inline
-alphaD : (al, be : Dim d) -> AlphaResult
-alphaD al be = if al == be then Ok else DClash (some al) (some be)
-
-mutual
-  private
-  alphaT : (s, t : Term d n) -> AlphaResult
-
-  private
-  alphaE : (e, f : Elim d n) -> AlphaResult
-
-
-export %inline alphaV : (u, v : Value d n) -> AlphaResult
-alphaV u v = alphaT u.fst v.fst
-
-export %inline alphaN : (p, q : Neutral d n) -> AlphaResult
-alphaN p q = alphaE p.fst q.fst