Can a non Jew write a kosher sefer torah? The Rabbis instituted a takana that if a man divorces his wife due to suspicions about her promiscuous behavior or because of a vow she made, he is unable to remarry her. There are 2 different reasons given for the takana. The tannaim also disagree as to which types of vows are referred to here. There is also a tannaitic debate about a man who divorces his wife because she is infertile, can he remarry her. The opinions of the tannaim here seem to contradict their opinions in the previous mishna and the emoraim tries to resolve these contradictions.