Rava did not agree with Abaye's solution in the alley where the non-Jew Lachman bar Ristak lived. He suggested an alternative solution. Rav Yehuda said two halachot in the name of Shmuel - one regarding a hired laborer or gatherer of a non-Jew can join the eruv on behalf of the non-Jew's property and one regarding one who drinks a quarter log of wine cannot teach/rule on halachic issues. Rav Nachman said that one thing he said was good and the other was not. He was reprimanded by Rava for speaking in that manner. Can one pray after one drank wine? Is there a difference if one just drank some wine or if one is drunk? Where does one draw the line? One who falls into money in a relatively easy manner, what can one do to prevent losing it? Walking a mil (2,000 cubits) or a bit of sleep helps on to become sober. The gemara brings a long story from a braita about Rabban Gamliel who went three mil after drinking before annuling someone's vow. Why three and not one? Various other laws are derived and discussed from this story such as picking up food that is thrown on the street, sitting while annuling vows, etc.