By inflicting brain damage. Boxing and MMA are the only sports with a primary objective of inflicting potentially fatal brain injury.
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Nonsense.
Just last Saturday night there was one of the biggest upsets in MMA history where Fabricio Werdum submitted Fedor Emeliananko via armbar.
The primary objective was to win by superior technique and no was was injured in the process.
It was a fantastic contest between true artists.