Geological field surveys in the Southern Volcanic Zone established the following facts regarding quaternary sediment samples:
• Every sediment core extracted from the caldera basin contains rhyolitic tephra layers only if it exhibits vesicular pumice clasts.
• Any sediment core that exhibits vesicular pumice clasts contains traces of titanomagnetite.
• If a sediment core contains traces of titanomagnetite, it was deposited during an explosive plinian eruption cycle.
• Sediment Core V-12 is a quaternary sediment core extracted from the caldera basin and contains rhyolitic tephra layers.
Statement: Sediment Core V-12 was deposited during an explosive plinian eruption cycle.
Cevap: Cevap
Cevap
True
Evaluating the statement as True is correct because the factual premises establish an unbroken conditional chain starting from a caldera basin core with rhyolitic tephra and ending with deposition during an explosive plinian eruption cycle. Since Sediment Core V-12 satisfies the initial condition, the conclusion is deductively certain.
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Anahtar Kavram
Conditional chain deduction (transitive inference and Modus Ponens)