proposition: Proposition isprojective_unit : IsProjective Unit.
proof: Proof. apply (isoprojective_ochoice purely Unit). intros P trP S. specialize S with tt. strip_truncations; apply tr. apply Unit_ind. exact S. Defined.
imports: Basics Types Truncations.Core Truncations.SeparatedTrunc Modalities.Modality Modalities.Identity Limits.Pullback