He played more than a decade at the highest level of basketball.
And throughout that career, the identity controversy remained part of the background.
Why the Theory Survived
At first glance, an official investigation should have ended the story.
If FIBA recognized İlyasova's identity, why would anyone continue questioning it?
The answer is that the theory contains just enough apparent coincidences to remain compelling.
There was allegedly an Arsen Ilyasov.
There was a person with a similar name.
There was an alleged disappearance.
There was an unusual registration story involving a Turkish teenager.
There were questions about the player's age.
And there was an Uzbek federation that reportedly challenged his identity.
For conspiracy theories, that combination is powerful.
But coincidences do not automatically prove identity fraud.
A person having a similar name to another person is not evidence by itself.
A questionable or unusual registration does not necessarily prove that two people are the same.
And the fact that an international federation investigated a complaint does not mean the complaint was ultimately substantiated.
The official record matters.
FIBA has continued to recognize İlyasova under the Turkish identity and 1987 birth date.
The NBA likewise continues to list him as a Turkish player born in Eskişehir in 1987.
The Age Difference Is the Most Important Part
The reason the story became so fascinating to basketball fans is the potential age difference.
If İlyasova had actually been born in 1984 rather than 1987, he would have been three years older than his official basketball biography suggested.
Three years may not sound enormous for an established professional.
But at the youth level, it can be significant.
Consider a tournament involving players who are 17 or 18 years old.
An athlete who is actually 20 or 21 would be competing against players who are substantially younger.
That could produce a major competitive advantage.
It could also affect scouting.
A teenager dominating an international youth tournament might be viewed as a remarkable prospect.
A player several years older doing the same thing would be evaluated differently.
This is why age verification became an important issue in international youth sports.
And it explains why the alleged identity switch became more than just a strange biographical rumor.
But There Is an Important Problem With the Theory
The theory requires several major assumptions to all be true simultaneously.
First, Arsen Ilyasov and Ersan İlyasova would have to be the same person.
Second, the alleged identity change would have to have been successfully documented or concealed.
Third, Turkish basketball authorities would have had to accept the altered identity.
Fourth, the international federation would have had to accept it after the dispute.
Fifth, the player would have had to maintain the identity throughout his professional career.
And sixth, none of the subsequent professional and international documentation would have exposed the discrepancy conclusively.
That is a very large chain of assumptions.
The existence of an unresolved controversy does not mean every part of that chain is true.
This is why responsible retellings should describe the Arsen Ilyasov story as an allegation or theory, rather than as an established fact.