One approach might be to set up two adversarial summarizers and a judge (like common-law litigation). Instead of using one model to identify and resolve all claims, a first model (plaintiff) seeks out the most supportive arguments for, and evidence of, claims across all nodes; then a second model (defendant) antagonizes the first by seeking out only disconfirming evidence and the best counter-arguments; the parties may get one or more replies or sur-replies; and then a third model (judge) evaluates the previous two against one another. The idea could be extended to incorporate appellate models that ensure compliance with the rules and propose changes to rules or addition/subtraction of rules. Appellate decisions could be maintained in a separate directory and accessed by the adversarial models.
More promising food for thought: developing and employing rules of evidence and procedure. For example, evidence may be taken only from immutable files; the first level nodes present issues, not summaries or syntheses; each issue has separate plaintiff, defendant, judge, and appellate nodes, from which a summary or explanation is ultimately created.