premise: A motel operator is scheduling appointments to start up services at a new motel. Appointments for six services—gas, landscaping, power, satellite, telephone, and water—will be scheduled, one appointment per day for the next six days. The schedule for the appointments is subject to the following conditions: The water appointment must be scheduled for an earlier day than the landscaping appointment. The power appointment must be scheduled for an earlier day than both the gas and satellite appointments. The appointments scheduled for the second and third days cannot be for either gas, satellite, or telephone. The telephone appointment cannot be scheduled for the sixth day. If neither the gas appointment nor the satellite appointment is scheduled for the sixth day, which one of the following must be true?
hypothesis: The landscaping appointment is scheduled for the sixth day.