Can one switch a Korban Pesach to be a different offering? Or any offerings to be other offerings? How similar or dissimilar would the two different offerings need to be? To establish the various boundaries for the offerings, as they emerge from comparison to the Korban Pesach. [Who's Who: Mavog] [Who's Who: Rav Mesharshiyah] To establish that there are different kinds of sin-offerings, with real practical differences among them.