Premise: Detroit . During the 19th century , it became an important industrial hub at the center of the Great Lakes region . The Detroit River flows for 24 nmi from Lake St. Clair to Lake Erie as a strait in the Great Lakes system and forms part of the border between Canada and the United States . The Great Lakes region of North America is a bi-national Canadian-American region that includes portions of the eight U.S. states of Illinois , Indiana , Michigan , Minnesota , New York , Ohio , Pennsylvania and Wisconsin as well as the Canadian province of Ontario .
Hypothesis: Detroit is not in North America.
Label: CONTRADICTION