More Discussions for this daf
1. Pouring hot water on certain foods on Shabbos 2. Rebbi Yochanan's Answers 3. כל שלא בא בחמין
DAF DISCUSSIONS - SHABBOS 145

Chaim Shulman asked:

The Mishna says Kol Shelo Ba B'Chamin MeiErev Shabbos Medichin BiChamin BiShabbos. Query: If it is referring to Kalei Bishul even Irui Kli Shenei is not allowed and if it is referring to non-Kalei Bishul even to cook inside a Kli Sheini itself (Shoreh) should be allowed, so why single out Medichin which implies that only Irui is allowed?

The Kollel replies:

TOSFOS (39a, DH Kol she'Ba) asks your question. Tosfos cites the RI who answers that even though a Kli Sheni does not cook, nevertheless we may not be Shoreh a food in a Kli Sheni because it *looks* like one is cooking. We may only place spices into a Kli Sheni because that does not look like the act of cooking.

Alternatively, suggests Tosfos, it is permitted even to be Shoreh in a Kli Sheni. The Mishnah mention Madichin only to teach that when it comes to the Kulyas ha'Aspanin fish, even Madichin is forbidden.

Yours, Mordecai