Will's serious, isn't he? Well, Rosinante can't blame him, and gives a solemn nod in return. Yeah, he'll try to be more careful. He's always trying, it's just that he's eternally failing. At this point it's unlikely to change.

But he can learn new things to make up for it, maybe. He looks at the cup of coffee, and tries to see if he can get a sense of the properties of the liquid as if it were sound instead. Obviously if it were easy he would have done this long ago, but it was sound that came to him easily, almost innately. Knowing what he knows now about devil fruits, it's probably because of what his life was like at that age. He needed to hide, and not be found.

"Guess it's a little like an optical illusion," he muses aloud as he puts a hand around the cup just to see if that helps. "You see it one way, and sometimes your brain refuses to see it a different way, even though both are valid interpretations."

And just in case it helps, he closes his eyes. Is that the vibration of the water he feels? Is he just imagining it? This is almost certainly going to be more than a one-day project, but he has to start somewhere.