"Well, he's an outrageously good singer, so it makes sense if a song's oomph scales up with its quality."
"I should probably find out sometime what the composition process is like to get magic out of it, see if there's an obvious reason humans never found it."
"I think I have read one short story in which music was magic - but differently - and this is alongside lots of stories about forms of magic that definitely don't work like divination by blood sacrifice or stepping into a tree to walk out of another tree miles away."
"Yeah, it's something else, and if it could reasonably be that humans are just too bad at music and too impatient to stumble across it that's hardly impossible but it depends on how hard it would in fact be to stumble across, which I don't currently know."
"And we may just optimize for completely different things in our music or something. But we do have lullabies..."
"I wonder how that interacts with infectious agents. Do you even get those? Ever?"
"So, I actually looked this up once, the vaccine for the pox is literally deliberately infecting somebody with a similar disease. Someone noticed that if you'd had that similar disease, you wouldn't get the pox, even if you hung out with poxy people all day long. So now when kids are like three they have to sit through having the - there's like fifty names for the thing, my creche's kids called it 'the bad freckles' - but it practically never kills anybody. And some other vaccines are actually the same disease as the one they're trying to prevent, but administered 'dead'."
"Yeah, the body learns. It's possible Lári should get a standard course of vaccines even though she's growing up here. But what I was wondering was if you gave a batch of creche kids the bad freckles and they were cooped up in quarantine getting over it so they didn't pass it to anyone younger, and then you sang them all better and they left, would they get the immunity? Would they still be carrying the freckles?"