Kollel Iyun Hadaf, Jerusalem
1) In the second answer (to resolve the Kashya on Chizkiyah from Hillel and Shamai), the Gemara differentiates between a box that was examined and one that was not.
(a) What is now the Machlokes between Rebbi Yochanan and Chizkiyah?The Gemara then gives a third interpretation of their Machlokes: If the box is not covered, even Chizkiyah will concede that the Taharos that were in the box are Tamei retroactively - even if the box *was* examined. When *does* he declare the Taharos Tahor retroactively? When the box also had a cover.
(c) What then does Rebbi Yochanan hold, and what is his reasoning?2) The fourth and final interpretation of Chizkiyah and Rebbi Yochanan's dispute is that as far as the corner of the box goes, Chizkiyah agrees that it is Tamei retroactively - in all cases. *Their* Machlokes concerns, not from one corner of the box to another, but from one corner of the house to another.
What exactly, is their Machlokes?
(a) What does the Gemara ask on Rebbi Yochanan from the Mishnah "Naga be'Echad ba'Laylah".
4) With regard to the loaf on the board, how can we contend with a person who may or who not have placed it where it is. Surely this is a classical case of 'Safek Tum'ah bi'Reshus ha'Yachid' (did the loaf touch the Tamei garment or did it not?), which, on principle, is Tamei? (two answers) - How does the Gemara prove its second answer from the fact that the Beraisa uses an example of Madaf?
5) What is the Chachamim's Chidush in telling us that 'mi'Pekidah li'Pekidah Mema'etes mi'Me'es le'Es'? Is that not obvious?
6) Raba suggested to Abaye that the reason that the Rabbanan only go back retroactively twenty-four hours, is because a woman is always aware when she sees blood (like one of the explanations in Shamai).
(a) What is wrong with that explanation?The real reason of the Rabbanan is that, on account of her laxness in keeping the Takanas Chachamim (by not examining herself every morning and evening), they penalized her to lose one Onah (twelve-hour period).
(c) But surely 'Mei'es Le'es' is two Onos, not one?The Gemara asks that sometimes it works out to three Onos, not two.
(d) What is the Gemara's Kashya, and what is the answer?7)
(a) What is the Gemara's second answer to the above question?8) Rebbi Dosa maintains that we say Dayah Sha'atah by every woman who has a Veses.
(a) What do the Rabbanan (Rebbi Eliezer) say?9) The Beraisa writes even a woman who has a Veses, is Temei'ah retroactively, if she sees a bloodstain.