diff --git a/src/Categories/Category/Lift/Properties.agda b/src/Categories/Category/Lift/Properties.agda
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+{-# OPTIONS --without-K --safe #-}
+
+module Categories.Category.Lift.Properties where
+
+open import Level
+
+open import Categories.Category.Core
+open import Categories.Category.Equivalence
+open import Categories.Category.Lift
+open import Categories.NaturalTransformation.NaturalIsomorphism
+import Categories.Morphism.Reasoning.Core as MR
+
+unliftF-liftF-weakInverse : ∀ {o ℓ e} o′ ℓ′ e′ (C : Category o ℓ e) → WeakInverse (unliftF o′ ℓ′ e′ C) (liftF o′ ℓ′ e′ C)
+unliftF-liftF-weakInverse o′ ℓ′ e′ C = record
+  { F∘G≈id = niHelper record
+    { η = λ X → id
+    ; η⁻¹ = λ X → id
+    ; commute = λ f → id-comm-sym
+    ; iso = λ X → record
+      { isoˡ = identity²
+      ; isoʳ = identity²
+      }
+    }
+  ; G∘F≈id = niHelper record
+    { η = λ X → lift id
+    ; η⁻¹ = λ X → lift id
+    ; commute = λ f → lift id-comm-sym
+    ; iso = λ X → record
+      { isoˡ = lift identity²
+      ; isoʳ = lift identity²
+      }
+    }
+  }
+  where
+    open Category C
+    open MR C
+
+liftC-strongEquivalence : ∀ {o ℓ e} o′ ℓ′ e′ (C : Category o ℓ e) → StrongEquivalence (liftC o′ ℓ′ e′ C) C
+liftC-strongEquivalence o′ ℓ′ e′ C = record { weak-inverse = unliftF-liftF-weakInverse o′ ℓ′ e′ C }