 This concern is shared by Perrella.The semantic weight of this expression would require a good many other qualifications and clarifications, especially in the case under examination, where she who is wished to be proclaimed co-redeemer is, in the first place, one who is redeemed, albeit in a singular manner, and who participates in Redemption primarily as something she herself receives.Thus we see the inadequacy of the above-mentioned term for expressing a doctrine which requires, even from the lexical standpoint, the proper nuances and distinctions of levels.It was rejected by the Vatican in the past because of serious theological difficulties.