The answer brought for the contradiction against Rav was that Rava said that Rabbi Yehuda admitted that when it came to sprinkling the blood, the altar was needed. Where did Rava make that statement? A long argument between Rabbi Yehuda and Rabbi Yosi is brought to give background. Then a proof is brought for Rava but then rejected. Sources are brought to derive the need for the altar for remains of the minachot, kodshai kodashim and kodshai kalim.