premise: Six park rangers—Jefferson, Koguchi, Larson, Mendez, Olsen, and Pruitt—are each to be assigned to monitor one of three areas—area 1, area 2, and area 3—in a national park. At least one ranger, but no more than three, is assigned to each area. The assignment must conform to the following conditions: Mendez is assigned to area 3. Neither Olsen nor Pruitt is assigned to area 1. Larson is assigned to the same area as either Koguchi or Mendez but not to the same area as both. If Olsen is assigned to area 2, then Jefferson is assigned to the same area as Koguchi; otherwise, Jefferson is assigned to a different area than Koguchi. Which one of the following rangers CANNOT be assigned to area 3?
hypothesis: Jefferson