[He simply nods in response to the initial question. Why and how Robin lost his memory, he's not entirely sure. But he doesn't want it to put others at a disadvantage nor take away from their efforts, and thus...all this research.

Posed that second question, he spares his notes another glance with a small shrug of his shoulders]

I've no way of knowing what might become useful or when, no matter how incidental it seems. And I'd rather be prepared for something that never comes up than be caught unawares and let any of you down.