premise: Colville Lake is the 20th largest lake in Canada's Northwest Territories. The lake is located 100 km (62 mi) northwest of Great Bear Lake in the Sahtu Region. The lake has a perimeter of 121 km (75 mi) and a net area of 416 km² (161 sq mi) and a total area of 439 km² (169 sq mi).
hypothesis: Great Bear Lake is the 20th largest lake in the Sahtu Region
reason: It is neither because it doesn't tell us how big Great Bear Lake is or where it would rank in the Sahtu region. The system is confused because it already identified Colville Lake as the 20th largest lake, but in a separate region.