Pesachim 42 - Shabbat January 2, 18 Tevet

Is one punished by lashes for transgressing a negative commandment that is derived from a positive one? What should one do with water used by a baker that has flour mixed in? One must knead flour for the matza with mayim she'lanu - water that rested. Why? One should not use water that had been heated to knead the dough. What if one did and the dough didn't leaven - is one penalized for this or not? The third chapter begins with a list of items that are mixtures that include chametz. There are several interpretations of how to understand what the mishna is saying about their status of Pesach. The gemara explains what each of these items are, as well as offering some nutritional information about some of the items mentioned.