Quote Originally Posted by docdan63
Like, if Ace dies, doesn't that open the door to someone getting the next fire fire logia because he died? Wouldn't another one float up and a person can eat it then getting his power? Does anyone know what I'm talking about?
I think you guys are confusing this with my own personal explanation, which is a completely fabricated speculation. (I was the one that suggested that the fruits originated from the depths of the sea, as a reincarnation of the previous owner's ability.)

It is a fact, however, that no two of the same abilities exist. This was stated by Sanji when he got pissed off that Absalom found the invisible fruit.

Also, to continue from my previous post regarding logia's influence in the power struggles...I think there is much to be said about how the yonkou manage to represent so much strength. Why is it that the marines must rely on crazy cybernetics and logia powers to maintain a presence in the world balance, while Shanks is missing an arm and Whitebeard is practically incapacitated, neither have any sort of devil abilities, and yet all hell breaks lose if one of them is angered? It should be safe to assume that Shanks and Whitebeard are the strongest members of their respective crews, so what do they have that nobody else has?