Can you please, in very easy to understand english, explain to me what the two situations are with R' Chiya's sons? Why did they feel they could permit, and why did their father tell them to go back out and forbid what they had permitted? Thank you.
Mordechai Kashuk, kfar Chabad, Israel
Hello there and thanks for your inquiry. The Beriasa states that R. Yehuda forbids using an attic (Aliyah) ladder, and permits using a ladder generally used for access to the pigeon coop. R. Dosa permits moving it from one window to another. In the first explanation the sons of R. Chiya maintained that R. Yehuda differs with the Tana Kama, thus according to the Tana Kama an attic ladder may be used, and based on that they permitted moving an attic ladder. Their father maintained that R. Yehuda merely expounded on the opinion of the Tana Kama, but did not permit more than him.
In the second explanation, the sons of R. Chiya maintained that R. Dosa's statement permitting moving the ladder from one window to another applies to an attic ladder meaning that R. Dosa was more lenient than R. Yehuda. While R. Yehuda forbade any usage of an attic ladder, R. Dosa permitted tilting it from one window to another. Based on this, they permitted tilting an attic ladder from one window to another. R. Chiya explained to them that R. Dosa was more stringent and although R. Yehuda permitted moving a ladder generally used for access to the pigeon coop, R. Dosa limited it to tilting it from one window to another. In no way did he permit any usage of an attic ladder.
I hope this clears up the matter. If not please feel free to ask again.
All the best,