With all due respect, #80, please look at the OP. “can a Kohen marry a woman with a Jewish mother, but a non Jewish farther?” Someone was asking for something there!
Chatzi eved chatzi benchorin was a machlokes BS vs BH. BH said oved es rabo yom echad v’es atzmo yom echad. BS said tikantem es rabo, v;es atzmo lo tikantem. Ela Kofin es rabo v’oseh oso ben chorin, v’kosev lo shtar al chatzi damav. The it says that Chazru Bais Hillel l’horos k’veis Shamai. Should be Gittin 41-ish. Big sugya in BB 13 with a massive tosfos.