feat: introduce comparability assessment before contradiction reasoning

2026-08-02 16:28:11 +01:00
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+# v0.6 Comparability Experiment
+
+## Hypothesis
+
+The engine should confirm that observations are comparable before treating their difference as a contradiction that needs explanatory follow-up.
+
+## Fixtures
+
+1. Revenue increased by 18%, but cash in the bank fell over the same period.
+2. Complaints increased. Production increased.
+3. Average delivery time decreased by 25%, but order cancellations increased.
+4. Customer satisfaction increased, but complaints increased.
+5. Temperature increased. Ice melted.
+6. Sales doubled. Sales doubled.
+
+## Results
+
+- The first four scenarios repeated the same failure pattern: contradiction-level investigation could begin before comparability was established.
+- A deterministic comparability gate corrected that by producing one comparison question first.
+- Temperature increased / Ice melted was treated as comparability confirmed, so no comparison question was asked.
+- Sales doubled / Sales doubled was treated as comparability confirmed, and contradiction reasoning was not needed.
+
+## Whether comparability should become a permanent reasoning stage
+
+Yes, in minimal deterministic form.
+
+The repeated pattern appeared in four scenarios, so a small pre-contradiction comparability assessment is justified.