Rabbeinu Tam and Geonim, part 2

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Date:
October 27 2020
Length:
50min 31s
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1222
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Series: Daily Shiur

Venue: YU High School for Boys YU High School for Boys

Gemara:
Pesachim,  Shabbat 

Collections: R' Tanchum Cohen Pesachim 5781

References: Shabbat: 34B ,  Shabbat: 35A ,  Shabbat: 35B ,  Pesachim: 93B ,  Pesachim: 94A ,  Pesachim: 94B  

Description

Review of basic astronomical facts, of setira between Shabbas and Pesachim, and of Rabbeinu Tam's solution (2 meanings of 'shekia', shekia as a process). 4+ kushyos against Rabbeinu Tam, which lead into Gra's solution to setira (2 meanings of 'tzeis kochavim'). Geonim, rishonim and earlier acharonim who already disagreed with Rabbeinu Tam. The 3 types of 'dusk' (civil, nautical, astronomical) and their meanings and angles correspond to Gra-Tanya and 2 calculations of Rabbeinu Tam, and this dovetails elegantly with Gra's attack on Rabbeinu Tam from alos ha-shachar (kushya 4) and with the Rav applied to the Gra.

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