Lemma t22_16_1 : ~ hypothesis_of_obtuse_saccheri_quadrilaterals -> forall A B C C1 D E F G H I K L M, Bet A C1 C -> Defect A B C1 D E F -> Defect B C1 C G H I -> SumA D E F G H I K L M -> SAMS D E F G H I /\ Defect A B C K L M.