[Avodah] Bitul on Erev Pesach

[Micha Berger]

Kayadua, there is a major kulah in that items bought before the issur
chameitz derabbanan on Erev Pesach can be bateil -- and the bittul carries
through for Pesach as well. Even though there is no bitul chameitz when
the issur is chal deOraisa.

Explanations generally involve the koach given chakhamim, etc...

Today's daf Y-mi, Maaseros 4:1 (vilna 18b)
<http://www.hebrewbooks.org/pdfpager.aspx?req=40742&st=&pgnum=155>,
seems to defy most such explanations.

R' Yochanan says that sales, the arrival of Shabbos and taking
the crop into a chatzeir only create a chiyuv of terumos umaaseros
deRabbanan.
R' Ami quotes Reish Laqish that a guarded chatzeir would start the
chiyuv deOraisa.

Heqdeish isn't subject to tu"m.

Later down on the page, this is used to discuss the case where
the food was stewed while heqdeish -- when there was no chiyuv.
Then someone was podeh it and brought it into a guarded chatzeir.

The gemara writes: Al taateih deRabbi Shimon b Laqish, litbal --
zu Torah, vezu eino Torah.

IOW, this Y-mi doesn't assume that a chalos that happens because
of a derabbanan changes the cheftza WRT the deOraisa as well.

Tir'u baTov!
-Micha

CC: RYGB, whose MP3s I use to chazur and check that my leining of the
gemara made sense.

-- 
Micha Berger             Mussar is like oil put in water,
micha at aishdas.org        eventually it will rise to the top.
http://www.aishdas.org                    - Rav Yisrael Salanter
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