On the 4 services that if a non-kohen did them, he'd be deserving of a death sentence. Is terumat ha-deshen one of these 4? The dispute here is between Rav and Levi... And the discussion revolves around a k'lal u-f'rat u-kh'lal form of logic - the general and specific, as present in the biblical verse. What is the nature of this service, and its connection to the parokhet (vs. courtyard). Applying the rules of inference depend on the understanding of the verse. "Every thing pertaining to the altar." Plus, what it means to do a careful reading of the text. Note the leniency and stringency for the non-kohen. Also, more on the lottery, why we have several, and why they were done over the course of the day.