According to international maritime records, any commercial vessel constructed after 2020 that is equipped with a dual-fuel engine is certified for zero-emission operations. Furthermore, no vessel is certified for zero-emission operations unless it utilizes a purely electric auxiliary power system. However, there are no commercial vessels built before 2025 that utilize purely electric auxiliary power systems.
If the statements above are true, which one of the following cannot be true?
- A commercial vessel constructed in 2024 is equipped with a dual-fuel engine.Cevap
- BA commercial vessel constructed in 2026 is equipped with a purely electric auxiliary power system but is not certified for zero-emission operations.
- CA commercial vessel certified for zero-emission operations was constructed in 2025 and is not equipped with a dual-fuel engine.
- DMost commercial vessels equipped with dual-fuel engines are not certified for zero-emission operations.
- EA non-commercial research vessel constructed in 2023 utilizes a purely electric auxiliary power system.
Cevap
The statement that a commercial vessel constructed in 2024 is equipped with a dual-fuel engine cannot be true, as it creates an impossible set of requirements.
Based on the rules provided, a commercial vessel constructed after 2020 with a dual-fuel engine absolutely must have a purely electric auxiliary power system. However, the final rule strictly forbids any commercial vessel built before 2025 from having this system. Therefore, any commercial vessel constructed in 2021, 2022, 2023, or 2024 is logically prohibited from having a dual-fuel engine.
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Anahtar Kavram
Identifying a scenario that violates the necessary conclusion of a chained conditional statement combined with a categorical restriction.
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