Oil contracts impurity, then congeals, then re-liquefies. What is its impurity status?
Halacha 1 states that oil or honey that contracts impurity, congeals, and then returns to liquid is considered a first-degree derivative of impurity forever, because they are liquids.
Question 2
When sauce or groats solidify, what type of impurity status do they take on?
Halacha 2 states that when sauce, groats, or milk solidify, they are considered as foods. Intent is then required for them to become susceptible, and touching them renders them secondary derivatives.
Question 3
A creeping animal carcass is found in an olive mill with no liquid flowing. What is impure?
Halacha 6 states that when a creeping animal carcass is found in an olive mill, only the portion which it touches contracts impurity. If liquid is flowing, everything becomes impure.
Question 4
When an unlearned person touches grape clusters in a winepress, what becomes impure?
Halacha 7 states that the clusters he touched and those around them are impure, but the clusters in the winepress as a whole are pure.
Question 5
When impure workers tread over already-pressed olive waste and liquid later emerges from it, what is the status of that liquid?
Halacha 8 states that the liquid is pure because the oil or wine was originally produced in a state of purity. The impure workers' treading over the already-processed waste does not contaminate the subsequent liquid.