diff --git a/src/Quox/Context.idr b/src/Quox/Context.idr
index a3c81b0..65e5328 100644
--- a/src/Quox/Context.idr
+++ b/src/Quox/Context.idr
@@ -21,24 +21,41 @@ data Telescope : (tm : Nat -> Type) -> (from, to : Nat) -> Type where
   (:<) : Telescope tm from to -> tm to -> Telescope tm from (S to)
 %name Telescope tel
 
+public export
+Telescope' : Type -> (from, to : Nat) -> Type
+Telescope' a = Telescope (\_ => a)
+
 ||| a global context is actually just a telescope over no existing bindings
 public export
 Context : (tm : Nat -> Type) -> (len : Nat) -> Type
 Context tm len = Telescope tm 0 len
 
+public export
+Context' : Type -> (len : Nat) -> Type
+Context' a = Context (\_ => a)
+
+
 export
 toSnocList : Telescope tm _ _ -> SnocList (Exists tm)
 toSnocList [<]        = [<]
 toSnocList (tel :< t) = toSnocList tel :< Evidence _ t
 
 private
-toList' : Telescope tm _ _ -> List (Exists tm) -> List (Exists tm)
-toList' [<]        acc = acc
-toList' (tel :< t) acc = toList' tel (Evidence _ t :: acc)
+toListAcc : Telescope tm _ _ -> List (Exists tm) -> List (Exists tm)
+toListAcc [<]        acc = acc
+toListAcc (tel :< t) acc = toListAcc tel (Evidence _ t :: acc)
 
 export %inline
 toList : Telescope tm _ _ -> List (Exists tm)
-toList tel = toList' tel []
+toList tel = toListAcc tel []
+
+export %inline
+toSnocList' : Telescope' a _ _ -> SnocList a
+toSnocList' = map snd . toSnocList
+
+export %inline
+toList' : Telescope' a _ _ -> List a
+toList' = map snd . toList
 
 
 infixl 9 .
@@ -65,6 +82,9 @@ public export
 Triangle : (tm : Nat -> Type) -> (len : Nat) -> Type
 Triangle = Context . Context
 
+public export
+Triangle' : Type -> (len : Nat) -> Type
+Triangle' a = Context $ Context (\_ => a)
 
 export
 0 telescopeLTE : Telescope _ from to -> from `LTE` to
@@ -79,10 +99,6 @@ export %hint
 0 succGT : S n `GT` n
 succGT = LTESucc $ reflexive {rel=LTE}
 
-export %inline
-absurd0 : (0 _ : Uninhabited a) => (0 _ : a) -> x
-absurd0 x = void $ absurd x
-
 
 parameters {auto _ : Applicative f}
   export
@@ -98,8 +114,8 @@ parameters {auto _ : Applicative f}
         Telescope tm1 from to -> f (Telescope tm2 from to)
   app [<]         [<]         = pure [<]
   app (ftel :< f) (xtel :< x) = [|app ftel xtel :< f x|]
-  app [<]         (xtel :< _) = absurd0 xtel
-  app (ftel :< _) [<]         = absurd0 ftel
+  app [<]         (xtel :< _) = void $ uninhabited xtel
+  app (ftel :< _) [<]         = void $ uninhabited ftel
 
   export %inline
   sequence : Telescope (f . tm) from to -> f (Telescope tm from to)
@@ -124,6 +140,7 @@ ftel <*> xtel = runIdentity $ (pure .) <$> ftel `app` xtel
 -- ...but can't write pure without `from,to` being relevant,
 -- so no idiom brackets ☹
 
+
 export %inline
 zipWith : (forall n. tm1 n -> tm2 n -> tm3 n) ->
           Telescope tm1 from to -> Telescope tm2 from to ->
@@ -138,6 +155,22 @@ zipWith3 : (forall n. tm1 n -> tm2 n -> tm3 n -> tm4 n) ->
            Telescope tm4 from to
 zipWith3 f tel1 tel2 tel3 = f <$> tel1 <*> tel2 <*> tel3
 
+export %inline
+zipWithLazy : forall tm1, tm2, tm3.
+              (forall n. tm1 n -> tm2 n -> tm3 n) ->
+              Telescope tm1 from to -> Telescope tm2 from to ->
+              Telescope (\n => Lazy (tm3 n)) from to
+zipWithLazy f = zipWith $ delay .: f
+
+export %inline
+zipWith3Lazy : forall tm1, tm2, tm3, tm4.
+               (forall n. tm1 n -> tm2 n -> tm3 n -> tm4 n) ->
+               Telescope tm1 from to ->
+               Telescope tm2 from to ->
+               Telescope tm3 from to ->
+               Telescope (\n => Lazy (tm4 n)) from to
+zipWith3Lazy f = zipWith3 (\x, y, z => delay $ f x y z)
+
 
 export
 lengthPrf : Telescope _ from to -> Subset Nat (\len => len + from = to)
@@ -172,14 +205,42 @@ parameters {auto _ : Monoid a}
   foldLazy = foldMap force
 
 
-export
+export %inline
+and : Telescope' (Lazy Bool) from to -> Bool
+and = force . fold @{All}
+
+export %inline
+all : (forall n. f n -> Bool) -> Telescope f from to -> Bool
+all p = and . map (delay . p)
+
+export %inline
+all2 : (forall n. f n -> g n -> Bool) ->
+       Telescope f from to -> Telescope g from to -> Bool
+all2 p = and .: zipWithLazy p
+
+
+export %inline
+or : Telescope' (Lazy Bool) from to -> Bool
+or = force . fold @{Any}
+
+export %inline
+any : (forall n. f n -> Bool) -> Telescope f from to -> Bool
+any p = or . map (delay . p)
+
+export %inline
+any2 : (forall n. f n -> g n -> Bool) ->
+       Telescope f from to -> Telescope g from to -> Bool
+any2 p = or .: zipWithLazy p
+
+
+export %inline
 (forall n. Eq (tm n)) => Eq (Telescope tm from to) where
-  (==) = fold @{All} .: zipWith (==)
+  (==) = all2 (==)
 
-export
+export %inline
 (forall n. Ord (tm n)) => Ord (Telescope tm from to) where
-  compare = foldLazy .: zipWith (delay .: compare)
+  compare = foldLazy .: zipWithLazy compare
 
-export
+export %inline
 (forall n. PrettyHL (tm n)) => PrettyHL (Telescope tm from to) where
   prettyM tel = separate (hl Delim ";") <$> traverse prettyM (toList tel)