Sugya – קורה
Very quickly review the גמרא דף ד: “היה גבוה מעשרים (two dots – six lines from bottom of Amud) until the two dots on דף ה
Focus on the second – fourth explanation
Explanation #2
According to which reason does the requirement to have 4 tefachim line up with – קורה משום היכר or קורה משום מחיצה?
Learn Rashi very carefully.
Questions:
Why does Rashi assume that the outer face of the קורה descends according to the opinion of קורה משום מחיצה?
Why is a build up of a tefach underneath the קורה insufficient? Once the height is reduced between the קורה and the ground the Mechitzah should descend and service the entire mavui?
Learn second half of תוס’ דף ד:-ה “מותר starting from “ואין להקשות”
Tosfos asks a major question:
According to the second explanation everyone agrees it is מותר להשתמש תחת הקורה and a build up of four tefachim is required because קורה משום מחיצה. This contradicts the premise of the first explanation of the Gemara (according to Tosfos) that everyone agrees קורה משום מחיצה and if its מותר להשתמש תחת הקורה only a one tefach build up is required?
Learn תוספות רבינו פרץ who explains Tosfos answer.
See גאון יעקב ד: “לימא בהאי קמיפלגי who explains the point of argument between the first and second explanation according to Tosfos. See the end of the paragraph and how he gives a different explanation of the position of Rashi in the first explanation of the Gemara and how he addresses the following questions we asked yesterday
According to the first explanation does Abaye and Rav Yosef hold קורה משום היכר or קורה משום מחיצה?
Rashi (רש”י דף ד: “מותר) discusses the need to see the קורה so why does Rashi need to add that we view the edge of the קורה as descending and creating a closure. It seems that Rashi is requiring both the element of היכר and מחיצה?
Clarify the third and fourth explanation of the Gemara
Learn רי”ף who explains the reduction of the height of the קורה different than Rashi
Learn רבינו יהונתן on the side of the רי”ף