《The validity has been questioned, so the use of "unquestionably" is risible.》
Mark 79 is risible, because his doubt is a mere negative doubt, and is therefore worthless. A researcher who was sent to Rome investigate the history of the rite of ordination; explained to me that he was able to find the docuмentary proof that there were three variant formulae used as the form of the sacrament during the Middle Ages: one with "ut", one with "et", and one with an ";", and no conjunction. The form of the sacrament of priestly ordination is not a novel formula; and it does express the intention to confer the priesthood, which suffices ad validitatem.