premise: Boulder ( ) is the home rule municipality that is the county seat and the most populous municipality of Boulder County, and the 11th most populous municipality in the U.S. state of Colorado. Boulder is located at the base of the foothills of the Rocky Mountains at an elevation of 5430 ft above sea level. The city is 25 mi northwest of Denver.
hypothesis: There are 11 municipalities in Colorado that have a greater population than Boulder
reason: The context says it is the 11th most populous, but that means there are only 10 municipalities with a greater population