 His lesson is interrupted by Ulvik, who arrives to test his sons' educations.While Prag demonstrates his understanding of humans (that they kill trolls for sport), and Borch demonstrates a knowledge of troll conduct (that those who are different should be avoided at all costs), the king only cares about Bu's learning.The crown prince timidly answers his father's questions, taken from the Troll Bible, correctly (reciting the Troll Golden Rule, his belief in growing more "evil and disgusting day after day", and that he is heartless and selfish), but finishes by politely asking to return to his seat.