...Right. [There's a fair amount there that he'd like to ask questions about, but that he's just going to leave be for the time being.]

You... have a really good memory, right? [Whether this is something Armin observed, or just something he associated with being a spy (thank you, Alcuin) is unclear.] Is it... is it possible to help teach someone else to improve their memory too?

[With all his telepathic skills, an eidetic memory would be ridiculously useful. Usually, he's ask Alcuin to help him - but it hasn't escaped his notice that Alcuin seems to be rather hesitant to teach him when it comes to matters of covertcy. Armin's not sure he understands why, but he doesn't want to press.]