Beis Hillel say, even if he gave her a Get on condition, if the stipulation was not fulfilled, she is permitted to Kohanim. Rather, we must check whether people say 'wrote a Get' when a man gave a Get. She is forbidden because of a doubt, perhaps they meant that a Get was given. No - because we only forced the new husband to divorce her, not the first husband, people will assume that he divorced her right before he died. Later generations are lenient as R. Dosa.
Later generations enter their produce through the roof or yard in order to exempt it from tithes.
Beis Hillel say, he must. If witnesses did not see relations, all agree that a second Get is not needed. There are witnesses that they were secluded, but not that they had relations. If she was divorced from engagement, all agree that a second Get is not needed because he is not so intimate with her, witnesses on seclusion are not as witnesses on relations. Amora'im argue which of these R. Yochanan said.