Premise: Muhammad Ali ( [ ɑːˈliː ] born Cassius Marcellus Clay Jr. ; January 17 , 1942 -- June 3 , 2016 ) was an American professional boxer and activist . Ali is regarded as one of the leading heavyweight boxers of the 20th century . He is the only boxer to be named The Ring magazine Fighter of the Year six times .
Hypothesis: Muhammad Ali is not a boxer.
Label: CONTRADICTION