2011 Abarbanel asks about yibum, Yehuda, and Boaz -- Abarbanel's 19th doubt in Ki Seitzei is about the incident with Yehudah and Tamar, and how that meshes (or does not) with the laws ofyibbum. Yehuda was a father to the deceased, not a brother! And how comehalacha does not recognize this as effective, patterned after Yehuda. Abarbenel's 20th doubt is about theyibbum desc…