A man consecrated one of two sisters but died not knowing which one he consecrated. He has one brother. What must the brother do?
Halacha 1 states that if there is one brother, he must perform chalitzah with both sisters.
Question 2
In the case of confused identities at birth, why may the doubtful sons not perform yibbum?
Halacha 4 explains that there is a doubt whether each woman is the wife of a paternal uncle, which constitutes an ervah.
Question 3
A woman remarried without waiting three months and gave birth to a son of uncertain paternity. What must the brothers from each husband do?
Halacha 6 rules that both groups must perform chalitzah but not yibbum.
Question 4
A woman's first husband traveled abroad, she heard he died and remarried, but he returned. Both husbands later die childless. What must their brothers do?
Halacha 9 rules that both brothers perform chalitzah only.
Question 5
When there is doubt whether a woman is forbidden to a man due to a Rabbinic prohibition, what happens?
Halacha 12 establishes that she should not perform yibbum whenever there is doubt about a forbidden relationship.