There has yet to be a fighter who has been able to solve the riddle who is Jose Aldo inside the Ultimate Fighting Championship (UFC) Octagon.
Fifteen men have tried (some more than once) during the dormant Brazilian's Zuffa tenure and all have failed to hand Aldo his second-ever loss of his mixed martial arts (MMA) career. His unprecedented run -- which includes 18 consecutive wins, including 10 title defenses dating back to the World Extreme Cagefighting (WEC) days -- actually tops the run of former Welterweight champ, George St-Pierre's.
And like "GSP," Aldo tells FOX Sports that he wants to end his MMA career at the top. Because that's what's important to "Scarface," not being promoted or talked about ad nauseam, as is the case with his UFC 189 opponent, Conor McGregor.
"I'm the dominant champion. I'm keeping this title for years, I'm always at the top of the division and at the top of the pound for pound ranking, so that makes it big. But I don't care about it if Dana promotes the other athlete or not. The important thing is that I'm the champion. The promotion doesn't guarantee nothing, the champion does and it doesn't matter if they are promoting or not."
He continues:
"I've seen champions that didn't do well in their careers in the end. I want to leave at the top, as champion, like Georges St-Pierre did. That's what I focus on. It doesn't matter who the opponent is, if I already fought him or not, if I'm going to, when I stop, when I look back, I will see that I fought the best and did pretty well."
On his quest to a perfect run inside the Octagon, Aldo will meet one of his toughest tests to date, going toe-to-toe with McGregor on July 11, 2015, in Las Vegas, Nevada.
Of course, that's only if Junior's bruised rib -- which he suffered during training -- doesn't keep him out of the much-anticipated championship fight.
If so, Chad Mendes is already on standby.
Should Aldo be able to compete and go on to notch his 19th straight victory in "Sin City," there won't be many new challenges left for him at 145 pounds, leaving him with potential rematches and trilogy fights.
But, after more than one decade of dominance, what are the chances Aldo takes the St-Pierre route and rides into the sunset prematurely?