The Gemara follows on yesterday's mishnah, explaining the dispute there. Plus, a new mishnah here! On the order of deaths, which determine heirs, of each generation - and the implications for collecting by heirs vs. creditors. With significant implications for a loan, the lien that extends on property, and then the question of whether the creditor can go after the property with the lien. But doesn't that involve future planning - for things under terms that do not yet exist? Which heightens the discussion about the collection of debt. Also: The case of a collapsed building, where it kills both a father and a son, and the question is who died first, such that the rules of inheritance kicked in, and then the order matters. Plus, the question of a loan that is made orally - and to what degree it is binding.