dispersal via the force of air (Jerusalem Talmud). In the Babylonian Talmud this refers exclusively to an act of separation, for example, chaff from grain – i.e. to any separation of intermixed materials. Example: If one has a handful of peanuts, in their paper-thin brown skins, and one blows on the mixture of peanuts and skins, dispersing the unwanted skins from the peanuts, this would be an act of winnowing according to both the Babylonian and Jerusalem Talmud. The Jerusalem Talmud has a more inclusive and general definition of Zoreh. By this definition, use of the Venturi tube spray system and spray painting would come under this prohibition, while butane or propane propelled sprays (common in deodorants and air fresheners, etc.) are permissible to operate as the dispersal force generated is not from air, rather from the propellant within the can. According to the Babylonian Talmud's definition, neither of the above spraying methods is involved in sorting undesirable from desirable and therefore not part of this heading. Rabbi Moses Isserles (the Rema) holds that, unusually, the Jerusalem Talmud's definition should also be taken into account. As there's no argument between the Rema and the Beit Yosef on this point, Ashkenazi and Sephardic Jews do not disagree with the Rema's extended inclusion of the Jerusalem Talmud's definition in this case. See further: Shulkhan Arukh Orach Chayim 219:7; Chayei Adam Shabbos 15. Sorting/purification Hebrew: (Borer) Definition: Removal of undesirable from desirable from a mixture of types. In the Talmudic sense usually refers exclusively to the separation of debris from grain – i.e. to any separation of intermixed materials which renders edible that which was inedible. Thus, picking small bones from fish in order to eat the remaining fish would be borer. It's of note that this is why Gefilte fish became so popular as a culinary dish on the sabbath, as a solution to this problem. Sorting/purification differs from threshing/extraction as here there is a mixture of types, and sorting a mixture via the removal of undesirable elements leaves a purified, refined component. In contrast, threshing/extraction does not entail sorting or purification, just extraction of the inner from the unwanted housing or outer component, such as squeezing a grape for its juice. The juice and the pulp have not undergone sorting, the juice has been extracted from the pulp. For example, if there is a bowl of mixed peanuts and raisins, and