Shabbat 71: How the Timing of Our Transgressions Affect Atonement

Very briefly:

Our daf begins with a discussion about different transgressions on Shabbat and their punishments.  Grinding, drawing and eating forbidden fats are used as examples.  Much of the daf focuses on how much one must transgress in order to bring an offering as punishment/consequence.  If one eats a half an olive bulk unwittingly and then another one unwittingly within a certain amount of time, is one offering required or more than one required? 

Rabbi Yochanan and Reish Lakish argue about this based on their interpretations of verses in Leviticus.  Yochanan quotes verse 4:26 where we learn that for each sin one will bring a separate offering.  Reish Lakish considers Leviticus 4:28, where a priest makes expiation on another's behalf, and the sin shall be forgiven.  Reish Lakish believes this means that one sin-offering can atone for multiple sins.