Check your work: Compare two live hypotheses before revealing the next case

Staged checking material

Answer key

1. Staged test memberships: D1=N, C1=M and N1=M. Do not open this line until all six H1/H2 predictions are locked.
2. Worked reference after scoring: a triangle rule predicts N, M, M and scores 3/3; a blue rule predicts M, N, N and scores 0/3 on D1/C1/N1.
3. The three opening cards do not distinguish the triangle and blue reference rules because both fit M, N, N there.
4. A rule that fits all six supplied cards remains bounded to this fixture. Other untested rules may fit and need a new discriminating card.

Scoring rule

Award 2 points for two distinct learner-generated rules that fit I1–I3, 1 for each of six locked H1/H2 test predictions, 1 for each of six correctly scored predictions after the key, 2 for evidence-linked confidence updates, 1 for preserving a failed rule and 1 for a bounded alternative/new-card statement: 18 total. Any test prediction written after the key earns 0.

Authority boundary: A governed step-by-step lesson may be completed independently inside its stated limits.