H017 Review

• Hypothesis ID: H017
• Name: Procedural Compression
• Current statement: Different surface representations may compress into a stable recovered procedural structure.
• Research question: Do representation variants compress into the same recovered structure strongly enough to be meaningful?
• Prior direction and strength: active / low
• Prior kill-condition status: not_tested

Evidence Supporting

• EXP-002 completed all expected records and maintained full representation compliance. Source: research/evidence-runs/ECR-000003-representation-sensitivity/experiments/EXP-002-cross-representation-stability/comparison/generated-v3.1/exp-002-comparison-summary.md
• Explainability reported explicit compressed-step and expanded-step patterns rather than only flat disagreement. Source: research/evidence-runs/ECR-000003-representation-sensitivity/comparison/ECR-000003-explainability-summary.md

Evidence Challenging

• EXP-002 still reported mixed backbone and disagreement in primitive and constraint layers. Source: research/evidence-runs/ECR-000003-representation-sensitivity/experiments/EXP-002-cross-representation-stability/comparison/generated-v3.1/exp-002-comparison-summary.md

Mixed Evidence

• Compression-like behavior is visible, but not enough to claim that multiple representations reliably collapse into one stable structure.

Provider, Representation, and Domain Effects

• Representation family matters.
• Some disagreement may reflect optional elaboration or summarization rather than full structural divergence.

Relevant Instrument Findings

• Backbone measures appear more stable than primitive or constraint measures, which is consistent with a limited compression story.

Threats

• representation-format effects
• prompt-induced structure
• missing human comparator

Alternative Explanations

• Apparent compression may be produced by comparator abstraction rather than by the models recovering the same structure.

Kill Condition

• Current kill condition: narrative, bullet, graph, and transition-table representations produce materially unrelated recovered structures.
• Status: partially_met

Proposed Direction

slightly_supported

Proposed Evidence Strength

weak

Board Recommendation

retain

Rationale

The evidence is more supportive than neutral, but still too limited for a broader compression claim.

Next Evidence Needed

• negative non-isomorphic controls
• human extraction comparisons
• constraint-layer calibration

Human Decision

• Decision:
• Reviewer:
• Date: