Every container vessel docking at Port Vane must either utilize shore power while berthed or burn certified ultra-low emission fuel. Any vessel that burns certified ultra-low emission fuel is subject to mandatory fuel auditing by the maritime authority unless it possesses an active green-flag certification. Yesterday, the container vessel Meridian Star docked at Port Vane, did not utilize shore power while berthed, and does not possess an active green-flag certification.
If the statements above are true, which one of the following must also be true?
- AAny vessel docking at Port Vane that undergoes mandatory fuel auditing did not utilize shore power while berthed.
- BEvery container vessel that docks at Port Vane without an active green-flag certification is subject to mandatory fuel auditing.
- The Meridian Star is subject to mandatory fuel auditing by the maritime authority.Cevap
- DIf a container vessel possesses an active green-flag certification, it is required to utilize shore power while berthed at Port Vane.
- EThe Meridian Star will be prohibited from docking at Port Vane in the future if it fails the mandatory fuel audit.
Cevap
The Meridian Star is subject to mandatory fuel auditing by the maritime authority.
The conclusion that the Meridian Star is subject to mandatory fuel auditing strictly follows from combining the premises. Under Port Vane rules, every docking vessel must use shore power or burn ultra-low emission fuel. Since the Meridian Star docked and did not use shore power, it had to burn ultra-low emission fuel. Under the second rule, burning that fuel triggers mandatory fuel auditing unless the ship has green-flag certification. Because the Meridian Star lacks this certification, the audit is strictly required.
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Deductive Conditional Chaining and Disjunctive Elimination
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