0-4 min silent entry, then round-robin: Q1 “List two statements the numbers directly support and one they do not.” Purpose: claim boundary; anchors 107/198, 131/214, non-randomization. Wait 45 seconds. Evidence follow-up: “Which exact feature prevents the causal statement?” Risk: treating seven points as caused effect. Do not lecture before all groups state a boundary.
4-11 min Q2: “What plausible differences between the periods could change how we interpret 54% and 61%, and which are actually supplied?” Purpose: distinguish evidence from hypotheses. Follow-ups: “Is that in the case or a verification need?” “What observation would separate those explanations?” Do not ask students to guess patron motives.
11-19 min Q3: “How should opt-outs, late messages, and staff minutes change the design decision?” Paths may frame measures, thresholds, access, or capacity. Challenge: “Could the same fact support different choices under different risk tolerances?” Avoid assuming any threshold. Q4 if time: “Whose interests are affected, and what evidence—not presumed views—would be needed?” No personal privacy stories required.
19-29 min groups choose Design, Refine, or Decline. Q5: “State the strongest evidence for your option, its strongest weakness, and two conditions that would change it.” Assign rotating roles: evidence locator, alternative challenger, recorder, reporter; remote participant can take any role via shared text. Dominant voice move: each person writes before open discussion; disagreement move: paraphrase the competing reasoning before rebuttal.
29-34 whole-class comparison; Q6: “Which conditions are necessary before design work, and which only before test launch?” Facilitator should not declare one option correct where conditions differ. Remove Q4 if behind, not Q5. 34-35 exit: one bounded conclusion plus one missing fact. Audit: all questions serve causal reasoning, guardrails, alternatives, or proportionality; no forced disclosure, false balance, or invented actor belief; bilingual terms and spoken/text participation support access.