Jack opened his mouth to protest, but he then realized he wasn't sure whether Caleb was wrong or not. He knew that sirens were a short-lived species, but he had no idea if a mute siren would have a shorter life than one who sang every day.
"Very well," Jack said, conceding the point. "I understand. I do not know whether this is true, so... I'd rather not risk it for one of my smartest students. Thank you for sharing your song with me. Do you... Do you feel better now? Guilt is harsh mistress, but she can teach you some valuable lessons."