Talk:Marine Headquarters/Devil Fruit Committee/@comment-3507136-20111107132040/@comment-3387274-20111108193215

I think it's more allong the lines of: either is unaffected by any physical attempt to damage it, or will reform by a natural process after suffering such damage. Light doesen't reform on it's own, and nor does ice, but the former can't be struck at all, and the latter would merge if you melted and refroze, or just added more water and froze.