REVIEW QUESTIONS ON GEMARA AND RASHI
prepared by Rabbi Eliezer Chrysler
Kollel Iyun Hadaf, Jerusalem
Previous dafEruvin 90
ERUVIN 90 (10 Av) has been dedicated by Rabbi Dr. Eli Turkel of Ra'anana,
Israel, to the memory of his father, Yisrael Shimon ben Shlomo ha'Levi
(a) Rami bar Chama asked whether, if a roof is side by side with a column,
both of which are ten Tefachim tall and four Tefachim square, one may
carry two Tefachim on the one and two Tefachim on the other.
must he hold to ask such a Sha'aleh?
(b) Why was Rami bar Chama careless to pose the Sha'aleh such a Sha'aleh?
(c) His Sha'aleh should really have concerned carrying from the roof of a
house to that of a porch.
What exactly, would the Sha'aleh then be? What
may be the two possible reasons of the Rabbanan, who forbid carrying from
one roof to another, and how will this determine the Sha'aleh?
(d) In light of the previous Sha'aleh, how does Rav Bibi bar Abaye justify
his Sha'aleh with regard to carrying from a roof to a ruin? Why are they
not one and the same Sha'aleh?
(a) Rebbi Meir in our Mishnah considers all roofs to be one Reshus;
whereas according to the Rabbanan, each one is its own Reshus. Rav takes
this literally to mean that one can carry on all the roofs, or on each
roof any distance (provided they are not more than a Beis Sasayim).
does Shmuel explain the two opinions?
(b) How does Shmuel explain Rebbi Meir, who says 'Reshus Achas le'Chulan'?
In what respect are they considered *one* Reshus?
(c) How does Rav's opinion here appear to clash with his own opinion
earlier on the previous Daf, with regard to the owners forbidding each
other to carry from one roof to the other?
(d) How do we reconcile Rav here with his opinion there?
(a) By the same token, how do we reconcile Shmuel here with his opinion
there, where he permits carrying on all the roofs, according to the
Rabbanan? Why does he forbid it here?
(b) But surely the houses are Hukaf le'Dirah? So why should carrying be
forbidden on the rooftops?
(a) Rav permits carrying in a boat that is more than a Beis Sasayim,
because, he argues, it is Hukaf le'Dirah.
Answers to questions
Why does Shmuel disagree?
(b) What did Shmuel reply when they asked him whether the Halachah is like
him or like Rav?
(a) Even Rav agrees that if the boat is overturned, one is restricted to
Why was the boat overturned? What will the Din be if it
overturned for different reasons?
(b) Rav Ashi quotes the Machlokes between Rav and Shmuel by a boat (as we
just learnt). In what connection does Rav Acha b'rei de'Rava quote it?
What is the basis of their Machlokes?
(a) The Gemara asks that, according to Rav (who permits carrying even more
than four Amos on a roof - according to Rebbi Meir), why does Rebbi Meir
not permit carrying from a roof-top to a courtyard.
Why indeed does he
(b) Why does the Gemara confine its Kashya on Rav to the opinion of Rebbi
Meir, why not according to that of the Rabbanan too?
(c) Why does the Gemara only ask on Rav? Why does it not ask on Shmuel
(a) The Gemara then asks on Shmuel (in whose opinion we do not say 'Gud
Acheis Mechitzos' - in the above Sugya): why do the Rabbanan not permit
carrying from a single roof-top to an enclosure.
What do the Rabbanan
actually say in this regard?
(b) What does the Gemara answer?
(c) Why does the Gemara confine its Kashya on Shmuel to the Rabbanan? Why
did it not ask the same Kashya even according to Rebbi Meir, since both
are considered a Karmelis - according to Shmuel?
(d) Why does the Gemara ask only on Shmuel, and not on Rav?
(a) According to Rav (who considers a single roof a Reshus ha'Yachid), why
may one not carry from a roof to a *small* enclosure according to the
Rabbanan, or from a Chatzer to a Karfaf even according to Rebbi Meir,
which is less than a Beis Sasayim?
Since the Rabbanan prohibit carrying from a roof to a large enclosure, for
fear that the roof might break etc. (according to Shmuel), why do they
also not forbid carrying from one enclosure to another - for the same
reason (for fear that one of them might break etc.)?
(b) Then why may one carry from the Chatzer to the roof?
(c) Why does the Gemara not ask on Rav (who considers a series of roofs a
Karmelis according to the Rabbanan), why then, according to them, is one
not permitted to carry from them to an enclosure (which is more than a
(d) Why indeed does Rav not consider the roofs a full Karmelis, to carry
from them into a ruin or a porch or an enclosure?
Answers to questions