One-element type properties. \begin{code} {-# OPTIONS --safe --without-K #-} module MLTT.Unit-Properties where open import MLTT.Unit open import MLTT.Empty open import MLTT.Id open import MLTT.Negation 𝟙-all-⋆ : (x : 𝟙 {𝓤}) → x = ⋆ 𝟙-all-⋆ {𝓤} ⋆ = refl {𝓤} 𝟙-is-not-𝟘 : 𝟙 ≠ 𝟘 𝟙-is-not-𝟘 p = transport (λ X → X) p ⋆ \end{code}