\begin{code} {-# OPTIONS --safe --without-K #-} module MLTT.Identity-Type where open import MLTT.Universes data _=_ {𝓤} {X : 𝓤 ̇ } : X → X → 𝓤 ̇ where refl : {x : X} → x = x -Id : (X : 𝓤 ̇ ) → X → X → 𝓤 ̇ -Id X x y = x = y syntax -Id X x y = x =[ X ] y \end{code}