{-# OPTIONS --universe-polymorphism #-}

-- Level suc is not a constructor, and doesn't behave as one
-- for unification.
module LevelUnification where

open import Imports.Level

data _≡_ {a}{A : Set a}(x : A) : ∀ {b}{B : Set b} → B → Set where
  refl : x ≡ x

sym : ∀ a b (A : Set (suc a))(B : Set (suc b))(x : A)(y : B) → x ≡ y → y ≡ x
sym a .a A .A x .x refl = refl