Nedarim 7: A Halakhic Bathroom and a Reversed Excommunication

When an utterance of a statement take effect to have impact on the halakhic status of a thing, and how precise that kind of statement needs to be. Plus, R. Akiva on lashes (or not) to one who violates an oath, given the phrasing of the oath. Also, the language of "menudeh," detaching from something, which is fundamentally excommunication. Plus, how that phrasing includes God's name, and how excommunication can be required and also be annulled.