Bun isn't expecting them to study and so both Minelia and Sallina will be fine, but Tanidio sees no reason to tell them that. 

Well, she did what she could. (And got a reputation for being helpful.)

...reading random books is probably not a great way to study, but it's what she has.

Meanwhile--

Biana is flirting with Bun slightly more intelligently than Tetula.

"Sir? I had a question?"

"Yes? What did you want to know?"

"If you can't refuse treatment during an emergency, what precisely is an emergency?"

"That's a good question. There isn't an exact precise definition. It's when someone could imminently die if they don't get treatment, but that is a somewhat fuzzy category."

"What if other people will die if they don't get treatment? Like smallpox."

He thinks about it for a second. "Usually with smallpox the risk to their own life would be enough? But I would say that if,  for example, someone had an infection that was not deadly for adults, but was deadly for infants and they had a baby, that that would be an emergency. It's good that you're thinking about it." A student! Is applying knowledge! And asking questions instead of staring in blank terror!

"So there are really a lot of situations where you can ignore informed consent."

"You still need informed consent in an emergency-- though there is room to take into account not having a lot of time to explain,  or being unconscious."

"I mean, a lot of people are really stupid. Do you still have to listen to their informed consent if you know better than they do?"

Even if they gave him wizards, they still somehow managed to give him medical students. "Even if someone is very stupid, it's still their life. And as a doctor, you'd know better medically than most people,  so if that was all it took to not need consent--"

"Then I should just get to make all their decisions for them, obviously."

Tiny tiny medical student with a God complex. It's good that she's saying it out loud: the people that can articulate it are much easier to steer away than the ones that can't even put it into words.

He speaks gently. "Would you like me to make all the decisions for you?"

"...isn't that what being a teacher is?"

"... not in my experience?" Which is limited to residents, but still.

"You tell us what we're supposed to study and what our schedules are and when our meals are, and if you decided that good medical residents needed to live on gruel the kitchens would listen to you. I could drop out, but if I did they wouldn't let me go back to Ostenso Wizarding Academy and I'd have to become a laundry wizard."

What he means to say is some combination of 'Yes, technically--' and 'you do have free time' and 'those aren't medical decisions--'

What comes out is "I'm not going I tell the kitchens to do that. "

"I mean, obviously not, it won't help us become doctors."

"Even if it did,  I wouldn't."

That sounds weird and inefficient, which means it is probably Good, which means she should encourage him away from it.

"You should do the thing that makes us the best doctors, because children are dying."

"Children are dying, and no matter how hard we work, it's going to still be happening after we have both died. This isn't a sprint. We need to do things so that you can be the best doctor for the rest of your life,  not just so you finish your training faster."

"...I don't see how that contradicts what I said."

"You can't live your entire life on gruel, even if it would help other people."

"I want to do the thing that means that I achieve my goals whether or not it means I eat gruel."

(Biana has learned from Tanidio what his strategy for corrupting Bun is.)