Reply To: Daas Torah in gemora

Gedol, I understand what you are saying. I was going in the opposite direction: starting with gemora references and trying to understand what gemora means by dt, rather than trying to backfill our modern notion into the gemora. That’s for Chulin

For Kiddushin, r Y appears to appeal to dt. Note that both of them are respectful and polite, not using cr language. R Z is expressing his devotion to the teacher by carrying him, and his disagreement to the shidduch by silence and avoidance. R Y explicitly put Torah and daughter in the same sentence, that means he leans on his Torah authority. He also reconstructs R Z halachik thinking about yichus and explains why it is wrong. As gemora mentions the teacher is having a memory lapse here.
Maybe, my guess, because it is personal to him or because he holds strong opinion about EY, not fully letting another student to go meet the crazy mother arriving to Bavel… I am surprised I didn’t see more meforshim on this …