You buy produce twice from the same wholesaler. Under what condition may you tithe from one purchase for the other?
A wholesaler buys from many people, including both chaverim and common folk. We cannot assume two purchases share the same tithing status — unless the wholesaler explicitly confirms a single common source, since he has nothing to gain by lying.
Question 2
You buy vegetables from a private individual twice — once from one town and once from another. What is the halachah?
A private person is presumed to sell only his own produce. This presumption applies even across two different towns or two different containers, so cross-batch tithing is permitted.
Question 3
A baker sells to a bakery store and uses different molds. You buy several loaves there. How must you tithe?
A baker who supplies a bakery store kneads his dough from a single source and uses different molds. Because all loaves share one origin, you may tithe from one loaf for all of them regardless of mold.
Question 4
A poor person receives several small slices of bread as a charitable gift. How must he tithe?
A small gift indicates a stingy donor who likely did not separate tithes, so the tithing obligation is more pressing and we are stringent — each slice must be tithed individually.
Question 5
Nine distributors purchase bread from ten bakers, meaning at least one distributor buys from two bakers. What rule applies to anyone purchasing from any of these nine distributors?
Since one of the nine distributors buys from two bakers, a buyer cannot know which distributor he purchased from. The uncertainty spreads to all nine, requiring every buyer from any of them to tithe each mold separately.