premise: The employees of the Summit Company—J, K, L, and M—work a four-day workweek from Monday through Thursday. Every Monday, work begins on four raw workpieces, each of which is worked on for four consecutive days. On any given day, an employee works on exactly one workpiece. At the beginning of each workday after Monday, each workpiece is transferred from the employee who worked on it the previous day to another one of the employees, who will work on it that day. Workpieces cannot be transferred in any of the following ways: From J to M. From K to J. From L to J. If one workpiece is worked on by only two of the four employees in the course of an entire workweek, those two employees must be
hypothesis: J and L