https://en.wikipedia.org/wiki/Tycho_Brahe#Tycho's_nose
On 29 December 1566 at the age of 20, Tycho lost part of his nose in a sword duel with a fellow Danish nobleman, his third cousin Manderup Parsberg. At an engagement party at the home of Professor Lucas Bachmeister on 10 December the two had drunkenly quarreled over who was the superior mathematician.[12] On 29 December, the cousins resolved their feud with a duel in the dark. Though the two were later reconciled, in the duel Tycho lost the bridge of his nose and gained a broad scar across his forehead.[13]
It's sort of like how Russian's prove who has the better car insurer after an accident