It's on the same boat as :
"I will knock him out"
"I will submit him"
"I will be fine regardless of where the fight takes place"
"My stand up is better, my ground game is better, my wrestling is better"
Nothing much to see. The only one I'd be willing to believe in such a case would be Pettis.
"When I decided to go after the light heavyweight championship, I knew that I'd win it like I always do."
"Lebatard : What is your greatest advantage over Jon Jones?"
"Sonnen : Reach."