Round UUID: 3f109073-8ad8-4345-bb26-bb979c3f093a
Prompt:
Classify each reef as either 'Healthy' or 'Stressed' using ONLY the following explicit, threshold-based rules. Apply rules in the order given, using ALL available features named as decisive below. Do NOT guess or substitute features not in the rules.
A. Assign 'Stressed' if ANY of these are true:
1. ReefIntegrityScore is 'Very Poor'; OR PollutionLevel is 'Critical' and NOT all of the following: PreviousStressIncidents is 'None', DistantStressIndicators is 'None', PredatorActivityLevel is 'None'.
2. BleachingEventsPerYear is 'Constant' or 'Frequent' AND EITHER (AlgalCoverage is 'Extensive' OR 'Heavy' OR ReefIntegrityScore is not 'Good' or better OR PollutionLevel is 'High' or worse OR PreviousStressIncidents is not 'None' or 'Minor').
3. At least THREE of these are true:
• PreviousStressIncidents is not 'None'
• DistantStressIndicators is not 'None'
• NearbyHealthyReef is 'Absent'
• PredatorActivityLevel is 'High' or worse
• PollutionLevel is 'High' or worse
• BiodiversityIndex is 'Medium' or lower
4. ObservationDuration > 100 AND (BleachingEventsPerYear is 'Constant' or 'Frequent').
B. Assign 'Healthy' only if ALL of these are true:
1. BiodiversityIndex is 'High' or 'Very High'
2. ReefIntegrityScore is at least 'Moderate' (i.e., not 'Poor' or 'Very Poor')
3. PollutionLevel is 'Low' or 'Moderate'
4. PreviousStressIncidents is 'None' or 'Minor'
5. BleachingEventsPerYear is not 'Frequent' or 'Constant', UNLESS: (PollutionLevel is 'Low' or 'Moderate') AND PreviousStressIncidents is 'None' or 'Minor' AND BiodiversityIndex is 'High' or 'Very High' (all must be true for exception)
6. AlgalCoverage is not 'Heavy'; 'Extensive' is allowed if all other Healthy criteria are strictly met.
C. If neither A nor B applies, assign:
- 'Stressed' if there are at least TWO negative signals among: PreviousStressIncidents not 'None', DistantStressIndicators not 'None', NearbyHealthyReef 'Absent', PredatorActivityLevel 'High' or worse, PollutionLevel 'High' or worse, BiodiversityIndex 'Medium' or lower.
- 'Healthy' otherwise.
Notes:
- AlgalCoverage 'Extensive' alone is NOT sufficient for 'Stressed'.
- PollutionLevel 'Critical' is decisive UNLESS all other primary stress signals are absent.
- Numerical variables (ObservationDuration, CoralAgeEstimate, AcousticIntensity, ReefAverageAge) are only used in explicit rules above.
- In ambiguous cases not addressed above, classify as 'Healthy' ONLY if positive indicators are clearly dominant and NO decisive negative in A is present.
Apply these rules EXACTLY as written, without additional inference or exceptions.