More on the cistern, and how it's not necessarily included in the sale of the house - again, without specifying its inclusion. But how will the buyer get there? Perhaps by purchasing a right-of-way to get there, but it's a machloket. Which leads into another key machloket - between Rabbi Akiva and the sages, whether one sells "generously" or "sparingly" - what is included in that which is not stipulated? Or one of several other possible points of dispute.