Hab gives his brother a clear demonstration of what it means for people to support each other when he stands up to Master Watson on his brother’s behalf. Hab’s example teaches Nat to stand firm on the truth as he knows it, even when others disagree. And, on a small scale, this interaction teaches Nat something about risk and reward: although he risks a beating from the schoolmaster if Watson discovers any cheating, it’s worth the risk to show off what he can do and earn the schoolmaster’s respect. And, showing intelligence and ability opens up opportunities to Nat, like college, despite his family’s poverty.