Machshirin 2:3-4

Machshirin 2:3

Let’s say there were two pools of water in a house – one ritually clean and the other ritually unclean. Drippings near the unclean pool are unclean, while those near the clean pool are clean. Drippings midway between the pools are judged to be unclean. Let’s say that someone mixed clean and unclean iron. If most is from the unclean iron, the resulting mixture is unclean; if from the clean iron, then it’s clean. If it’s 50/50, the resulting mixture is unclean. Let’s say that Jews and non-Jews urinate in the same chamber pot. If most is unclean, the resulting mixture is unclean; if clean, then it’s clean. If it’s 50/50, the resulting mixture is unclean. Let’s say that rainwater fell into wastewater. If most is unclean, the resulting mixture is unclean; if clean, then it’s clean. If it’s 50/50, the resulting mixture is unclean. This is only the case when the wastewater was there first. If the rainwater was there first, then the resulting mixture is unclean regardless of the ratios.

Machshirin 2:4

Let’s say that a person washes his roof or launders his clothes and rainwater fell into the water he used. If most of the water is unclean, the resulting mixture is unclean; if clean, then it’s clean. If it’s 50/50, the resulting mixture is unclean. Rabbi Yehuda says if the dripping increased, then it’s clean (because the rainwater increased and has become the majority).