The Oral Talmud with Benay Lappe and Dan Libenson Episode 186

The Sages taught in a baraita: Cases of monetary law are adjudicated by three.

But if he was an acknowledged expert, then he may judge even alone. Rav Naḥman said: One such as I may judge cases of monetary law alone. And similarly, Rabbi Ḥiyya said: One such as I may judge cases of monetary law alone. A dilemma was raised before the Sages: What is meant by "Such as I"? That I am gamirna [learned] and savirna [have developed moral intuition], and have received permission.