premise: Monte H. Deadwiley (February 15, 1905 – October 26, 1961) was an American professional boxer nicknamed "Wildcat Monte" who fought as a welterweight boxer. He was active from 1923 to 1937 and fought a recorded 313 times in his 13 year-career. He has been regarded as one of the most active boxers of his time having fought over 30 times in one year periods throughout his career.
hypothesis: Active boxers have a career of 14 years.
reason: Monte Deadwiley was active and had a career of 14 years. Some are less. But other active boxers fight longer. Muhammad Ali fought professionally for 21 years. Archie Moore fought professionally for almost 30 years.