Hullin 96: The Flavor of the Sciatic Nerve

2 mishnayot! 1 - Which part of the sciatic nerve incurs a violation of the prohibition? And how much would one need to eat to be liable? Including a dispute and the distinction between what was prohibited at the biblical level of prohibition and what was prohibited at the rabbinic level. With an acceptance of diversity in the practice of kashrut that seems radical for many in this day and age. 2 - What happens when the gid ha-nasheh is imparting flavor to your meat? If it were not imparting flavor, you might well be able to eat that meat. But if it does, then you have to treat it as prohibiting the meat as well. But how do you know whether the sciatic nerve is providing flavor?