He doesn't know what the basic laws of physics are, but considering she's calling them basic he'll assume that most people should know them. As Anders doesn't want to appear ignorant, he's not asking at the moment. Maybe later. After he's tried to figure out what fire, water, and ice have to do with hands, eyes, and teeth.

"First aid? You mean the basics that anyone can do? Apply a poultice, wrap a wound, that sort of thing? That's easy enough to teach if you want to learn, and safe as well. There's not a chance of it going wrong when you learn what to do with the different sorts of wounds, stab or burn or the other different ones."

He sets the jar of fire down very carefully before pulling out a pair of tea cups and setting them next to her. He's tired, but not too tired to not give a hand with this.