-- ignore module 1FundamentalGroup.Quest0 where open import 1FundamentalGroup.Preambles.P0 Refl : base ≡ base Refl = {!!} Flip : Bool → Bool Flip x = {!!} flipIso : Bool ≅ Bool flipIso = {!!} flipPath : Bool ≡ Bool flipPath = {!!} doubleCover : S¹ → Type doubleCover x = {!!} endPtOfTrue : (p : base ≡ base) → doubleCover base endPtOfTrue p = {!!} Refl≢loop : Refl ≡ loop → ⊥ Refl≢loop p = {!!}