[The answer isn't entirely unexpected. After all, 9S couldn't imagine it either, when presented with the same hypothetical situation months ago. It seemed outlandish enough that he couldn't even picture it, and discounted it as something that wouldn't ever happen. Such a thing doesn't make sense.

And yet, despite that...

Maybe there really is no good answer, but 9S tries again, because he's pretty lost. And he doesn't think this is something he can really bring to A2. They're learning how to simply exist around one another and this is well beyond that]

Say they did, anyway, even if you didn't understand how. And they don't care that you're an android and they're not. How would you answer a thing like that?

[Help him 2B he's drowning here]