More Discussions for this daf
1. Good eyesight and saving the witnesses 2. Ein Onshin Min ha'Din 3. R. Yehuda Ben Tabbai and R. Shimon Ben Shetach
4. Witnesses Plotting 5. v'Hitzilu ha'Eidah 6. Miracles and Halachah
7. Punishing Edim Zomemim 8. The Gemara answers by saying it's a good question 9. Edim Zomemim dividing their punishment
10. Edim Zomemim 11. Rashi and Tosfos 12. Judges

Nissim Bitton asked:

The gemara teaches that we can't apply a kal vachomer to malkut and to issourim when there is a passouk that indeed teaches just that (ref: a daughter of a father or a dahghter of a mother). In this week's parasha ki tavo 27.22 it seems that one can curse one's sister of both father and mother, since we can't apply a kal vachomer. Or we can say that since ther is no specific passouk for a sister of both a father and a mother ( in passok 27.22) we could apply the kal vachomer and say that if one cannot have relations with a sister of a father or of a mother then certainly one cannot have relations with a full sister. What do you say?

Nissim Bitton, Montreal, Canada

The Kollel replies:

Being that there is already a Pasuk for being with a sister, whether half-sister or full sister as discussed at length by our Gemara, I do not see any need for a special Pasuk mentioning specifically a full sister.

All the best,

Yaakov Montrose