<human>:  Could a white belt defeat Jon Jones in a Brazilian jiu-jitsu match?
<bot>: No, Brazilian jiu-jitsu is a martial art focusing on grappling and ground fighting, originally based on Kodokan judo newaza taught by Mitsuyo Maeda. A white belt is the lowest ranking in Brazilian jiu-jitsu. Jon Jones has a purple belt in Brazilian jiu-jitsu under Roberto Alencar.