Eiruvin 13b records two years-long disputes between Beit Hillel and Beit Shammai, and surely these are not the only long-running debates. How did that work in practice? Did they really have a single ...
According to this, the gemara compares Toch Kedei Dibbur (the length of time neccasary to greet someone; see Shalom alecha rebbi (u'mori) ) to the time it takes to walk 4 amot (cubits). Thus, with ...