import logic data.prod open prod set_option class.unique_instances true set_option pp.implicit true theorem tst (A : Type) (H₁ : inhabited A) (H₂ : inhabited A) : inhabited (A × A) := _ set_option class.unique_instances false theorem tst (A : Type) (H₁ : inhabited A) (H₂ : inhabited A) : inhabited (A × A) := _