Premise: Houston . Located in Southeast Texas near the Gulf of Mexico , it is the principal city of the Greater Houston metro area , which is the fifth-most populated MSA in the United States . Houston is the most diverse city in Texas and has been described as the most racially and ethnically diverse major metropolis in the U.S. . Sam Houston . He is the namesake of the city of Houston , Texas 's most populous city and the fourth most populous city in the U.S. .
Hypothesis: Houston is not a city.
Label: CONTRADICTION