Shavuos 37: "I Forgot" is Not an Excuse - What is one's responsibility, cannot be excused with forgetfulness.
Shevuos 35: The Mistake of Pesel Micha - And the argument regarding the Kedusha of the names written there
Shevuos 32: Toch Kedei Dibur, Matan Torah - The understanding of Toch Kedei Dibur, and how Dibur appears in Matan Torah.