There are two different questions regarding Markelle Fultz. The first is whether he will ever become a playoff-caliber NBA starter. The second is whether he will ever become the brand of playoff-caliber starter that a team like the Sixers needs to complete its unique young nucleus. From a semantic point of view, that might seem a subtle distinction. But from the point of view of the Sixers' reality on the court, it is nothing less than defining.