Rebbi — the title given to Rabbi Yehudah HaNasi, the compiler of the Mishnah (the earliest code of rabbinic law) — examines a case in the Torah's laws of damages involving two oxen. One ox has gored and killed another. The Torah prescribes that the dead ox be divided in half and the living ox be divided in half, with the two owners splitting the proceeds. But Rebbi notices something in this language that most readers would miss.
The word "halving" appears twice. Once for the living ox and once for the dead ox. Rebbi argues that this repetition is not accidental. If the Torah mentions halving for both animals, it must be describing a scenario where the halved shares are meaningful, where the division produces genuinely equal portions. This is only possible if the two oxen were of equal value to begin with.
Consider the alternative. If the goring ox were worth far more than the dead one, the "halving" of each would produce wildly unequal shares, making the remedy lopsided. The Torah's symmetrical language, halving and halving, implies symmetrical animals.
This reading has significant legal implications. It means the Torah's baseline case for ox-goring damages assumes equal-value livestock. Other scenarios, where the animals are of unequal value, would require additional legal reasoning to determine fair compensation. Rebbi's interpretation demonstrates the rabbinic method at its most precise: a single repeated word generates an entire legal framework. The Torah does not waste language, and the Rabbis did not waste a single syllable of the Torah.