“An egg that was laid on Yom Tov: Beit Shammai says it may be eaten, and Beit Hillel says it may not be eaten”. For six pages, the Gemara discusses this poor little egg. The issues go far beyond an analysis of this debate—at least four reasons are given to explain Beit Hillel’s view—or a discussion of whether we are dealing with a hen raised for slaughter or egg production. This little egg is the springboard for...