Premise: Floyd Mayweather Jr. . He is also regarded as the best defensive boxer in the sport , as well as being the most accurate puncher since the existence of CompuBox , having the highest plus -- minus ratio in recorded boxing history . In 2007 , he founded Mayweather Promotions , his own boxing promotional firm after defecting from Bob Arum 's Top Rank .
Hypothesis: Floyd Mayweather Jr. has yet to be born.
Label: CONTRADICTION