Bava Metiza 17: Can a Ketubah Be a Get?

Bringing property disputes to court, especially when one part denies part of the terms or what is owed. Plus, the role of witnesses. But we do people trust that the disputant/denier isn't lying? Plus, a concrete case. Also, if one claimed that there were no witnesses, then the claim is fundamentally (likely to be) meaningless. Plus, the role of the ketubah, in an era when it wasn't yet universal. Plus, how the ketubah functions in the discussion of debts, denials, and other economic transactions.