Shmini Atzeret - why Sukkah YES and Lulav NO?

Why do we sit in the Sukkah in the Golah on Sukkot but do not take the Lulav etc. on Shmini Atzeret? This question has bothered me since I was a kid - AND there are MANY reasons given.

Questions:

1. Why are Hanukkah and Purim observed only 8 and 1 day respectively in the Golah? Why not add a day?
2. Why is Sefirah done on the 2nd day of Passover as definite and not done on both 2nd and 3rd keeping 2 counts out of doubt?

Answer: The above are only Derabbanan. Extrapolate to Sukkot - and Sukkah is D'orraito ALL 8 Days while Lulav is Derabban after day 1. [Except in the Mikdash, but the mikdash of course never has a sfeika d'yoma anyway.]

So Sukkah on the 8th day in the Golah is a "S'feik D'oraitta l'humra" while Lulav is a "S'feik Derabbana l'kulah"

Q: But Rabbi - why isn't this answer given?
A: Wolpoe's Rule #1 of Oral Law -

We often know the WHAT to Do, but we do not always know the WHY!

This model seems to me more straightforward than the various answers I have seen given over the years!

Shalom
RRW

Previously Published on NishmaBlog

Tuesday, 2 October, 2007

Ner Hanukkah on Friday Night - SA 679:1

The mechabeir pasqens to light Hanukkah BEFORE Ner Shabbos

But lich'ora, tadir v'sheino tadir, tadir qodem and Ner Shabbat should come first

MB 1 says while Mechabeir doesn't really hold that Qabbalas Shabbos starts with lighting Ner Shabbos, rather he is merely chosheish for that Sheetah, [aparently that of the BeHaG as quoted By SA himself 263:10]

Lich'ora this should also mean that the mechaber should pasqen to light Ner Shabbos before the Brachah! IOW not over la'assiyasson.

But then I realized that perhaps the mechaber is only chosheish for the BeHaG that LIGHTING starts Shabbos, but not for the Mordechai who holds the BRACHAH starts Shabbos, so "yeish lechaleiq"

KT
RRW