Study Guide Pesachim 62 Raba and Rav Chisda disagree on the issue of one who has intent while slaughtering that one will sprinkle the blood for uncircumcised people. Rabbi Ashi explains the source of the dispute between Rabbi and Rabbi Chisda. According to him, Rabbi Chisda uses the argument of “ho’il - since" and Raba does not. It contradicts their opinions regarding “ho’il” in the case of one who bakes on Yom Tov for after Yom Tov. How do they resolve the contradiction? The braita on the previous page took it for granted a sacrifice is valid if it was done for some impurity but not all. What type of impurity is this? And why was it so obvious that it is valid? The gemara raises several possibilities and raises questions against each possibility. Rabbi Simalai is said to have asked Rabbi Yochanan to teach him the book of genealogy (Sefer Yuchsin) and Rabbi Yochanan did not want to teach him. He mentions in this context the greatness of Bruria and how even though she was brilliant, it took her three years to learn Sefer Yuchsin. Rabbi Simlai also asked him about the difference between one who says one is sacrificing the Pesach for its own sake and not for its own sake which is invalid and one who says for those who can eat and those who cannot eat, which is valid.