Yevamos 95a: גדר אחות אשתו — כיצד זנות האחות יכולה לאסור את אשתו עליו?

Yevamos 94b: יבמה לשוק — למה נחשב דבר שבערוה שצריך שני עדים?

Yevamos 94a: האם גט פסול אוסר אותה על כהן? — נפקא מינה בגט שאינו מתיר

Yevamos 93b: Hotel Reservations and אין אדם מקנה דבר שלא בא לעולם

Yevamos 93a: אין אדם מקנה דבר שלא באו לעולם - How did Esav sell the Bechora?

Yevamos 92b: The Geder of the Issur Yibum if the Yevamah is Mezaneh

Yevamos 92a: The Lav of Zenus according to the Rambam

Yevamos 91b: The Astonishing Chiddush of the Kli Chemdah — Is There No Aveirah B’Shogeg by a Lav She’ein Bo Ma’aseh?

The Kli Chemdah suggests an astonishing chiddush: when someone violates a lav she’ein bo ma’aseh b’shogeg, it may not be considered a ma’aseh aveirah at all.

A lav can be violated through an action or through a conscious decision not to act. But when someone is shogeg—completely unaware of the prohibition—and there is no physical action, what exactly constitutes the aveirah? There was neither an act of violation nor a conscious decision to refrain from doing what the Torah required.

The Kli Chemdah brings a fascinating proof from Rashi in Berachos 2a regarding nosar. Rashi explains that Chazal prohibited eating korbanos after chatzos out of concern that a person might continue eating until after daybreak, when the meat becomes nosar.

But why does Rashi focus specifically on eating the meat after daybreak? Simply leaving korban meat uneaten until morning itself violates “Lo Sosiru ad boker.”

The Kli Chemdah answers with his remarkable yesod: merely forgetting to finish the korban before morning is a lav she’ein bo ma’aseh committed b’shogeg. There is no action and no conscious decision to violate the prohibition—and therefore, he argues, there is no ma’aseh aveirah at all.

Chazal therefore made their gezeirah to prevent the person from actually eating the nosar, an active violation.

A startling way to understand the very definition of an aveirah b’shogeg—and an extraordinary chiddush of the Kli Chemdah.

When a Bas Kohen becomes a zonah, why does she lose her right to eat terumah? Does the status of zonah actually strip away her Kedushas Kehunah, or does she remain a Bas Kohen while acquiring a new pesul that prevents her from eating terumah? A fascinating chakirah that may lie at the heart of a dispute between the Rambam and Tosafos—and has surprising implications for a Bas Levi and Maaser Rishon.

Yevamos 90b: When Does the Mitzvah of Tzitzis Begin? — The Fascinating Chiddush of Tosfos