How is sacrificial blood excluded from the prohibition against "notar" and impurity? As derived from verses, that is. Likewise, how is blood not subject to me'ilah, after atonement (or even before atonement). Also, how these details are derived from verses that seem indirect or insufficient, when we might have wanted more. Also, why does the Torah mention "karet," the punishment of being cut off, three disctinct times? Each teaches another factor - with a dispute between Rabbi Yochanan and Shimon.