It is necessary for Prophets — prayers and salutations be upon them — to have infallibility (ʿiṣma, عِصْمَة). Thus, they do not contravene Allah with regards to His commands and prohibitions; and likewise, the angels. It is necessary for Messengers — prayers and salutations be upon them — to convey to creation that which they have been commanded to convey from rulings and other matters…