This follows the Vilna Gaon's approach of carefully amending the texts of both exoteric (the Talmud) and esoteric works (for instance, the Torat Kohanim, Tosefta, Avot de-Rabbi Natan, etc.).

At this point he introduces an important distinction between Rishonim, which are primary sources, and must be mastered, even if one has to struggle to understand them; and Achronim, which are secondary sources, which can be exploited (if you find good material, use it, but if you don't understand it, don't spend too much time on it).

[1] Rabbi Michael Rosensweig wrote his Ph.D. (Debt Collection in Absentia: Halakhah in a Mobile and Commercial Age) under Prof. Soloveitchik and is one of the few students mentored by him.

Specifically, he has produced major studies of usury and pawnbroking and the multiple ramifications of Jewish involvement in the manufacture and sale of wine.

A major theme of his writing is the positing of an essential integrity to the Ashkenazi Jewish legal process in its interaction with contemporary challenges.