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Bach and Chatam Sofer on Ending Impossible Marriages (8 Tevet)
שו"ת ב"ח הישנות צ"ג 8 Tevet 5307 (1546)
שו"ת חתם סופר (אבן העזר ב) ד:פט 8 Tevet 5594 (1833)
The Bach talks about whether a man can marry a second wife if his first is incapacitated by insanity, and Chatam Sofer discusses whether a woman could believe her possible step daughter (if she went ahead with a yibum) that her father - the putative yabam, who's abandoned Jewish observance - had died.
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