Rabbi Baruch Bodenheim: Gemara Shabbos: Borer – Wednesday night shiur, Teves 24 – Filtering (01/14/26)

Filtering wine 

Quickly review משנה דף קלט עמ’ ב “ונותנין מים על גבי 

Why is it permissible to pour water over the wine sediments? 

Why isn’t this considered borer?

Learn Rashi

Based on Rashi – it’s permitted because he is not extracting the trapped wine from the sediments 

Learn Rashi on the Rif

Learn רע”ב על המשנה who says that he is trying to extract the trapped wine from the sediments.

Major Question:

Why isn’t extracting the wine from the sediments considered borer, especially in this instance that he is using a filtering tool?

Learn פרי מגדים משבצות זהב שי”ט ס”ק י (in middle) who gives one explanation 

Learn קובץ הלכות שבת פרק כז סע’ קלב הערה קנח for a new explanation 

See שולחן שלמה ס’ שי”ט ס”ק כב-כד 

Practical Halacha

Based on the above may one pour water over coffee granules that are in a coffee filter (using hot water from a Kli Shlishi)?