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Bal Tosif

According to the Ravyah (quoted by the Mordechai) who is concerned for bal tosif if one sits in the sukkah on Shmini Atzeres with kavana for the mitzvah, how can we blow shofar on the second day of Rosh Hashana, as we have kavana for the mitzvah, which is evident by the fact that we make a bracha.


In general the second day of Yom Tov which was established because of skfeika dyoma does not pose a problem of Bal Tosif. This includes kiddush, tefillos and the mitzvos hayom. Shmini Atzeres however is a different Yom Tov, so to sit in the sukkah looks like we are adding a mitzvah to a different Yom Tov which is not commanded in Sukkah, so there is more of a concern of Bal Tosif.

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