premise: Pangani Falls Dam is a dam in Tanzania, which is part of the Pangani Hydro Systems. The dam is located at Koani in the Muheza District of the Tanga Region, about 8 km south of another power station at Hale. The Pangani falls power station has two turbines and has an installed capacity of 68 MW .
hypothesis:  Tanga Region has only the Pagani Falls dam and no others.
reason: The system is only aware of the given dam and not of others that may exist in the area.