Nedarim 73: Impossible vs. Improbable

More on whether a father or husband can revoke a woman's hear he didn't hear. What if the man is deaf? With recourse to the example of an unmixed grain sacrifice (minchah) as a parallel. Also, a new mishnah on the women who wait the appropriate time period after betrothal - can that husband-to-be revoke her vows or not yet? Plus, the d'Orayta or deRabbanan divide.