This document discusses the authority of rabbis and oral law in Judaism. It notes that Deuteronomy 17:8-11 establishes the necessity of following rabbinic rulings. It also explains that there are different forms of oral law including takkanot, gezeirot, minhagim, and the 13 principles of interpretation. While some questioned if oral law could be added to the written Torah, Rambam and Raavad affirmed the authority of rabbinic rulings. The document also discusses why minhagim should be followed and differentiates between derabanan and deoraita laws in cases of uncertainty.