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Soru

Zorluk: OrtaSufficient Assumption

Botanist: Any plant species that thrives in highly alkaline soil must possess an extensive taproot system. The newly discovered Silene deserti thrives in highly alkaline soil. Therefore, Silene deserti must be capable of surviving prolonged periods of drought.

Statement: The assumption that 'any plant species capable of surviving prolonged periods of drought possesses an extensive taproot system' is sufficient to logically guarantee the botanist's conclusion.

Cevap: Cevap

Cevap

False
The statement is false because the provided assumption is an illegal reversal. To guarantee that Silene deserti can survive a drought, the assumption must state that having an extensive taproot (which we know the plant has) is sufficient to ensure survival during a drought. Instead, the statement claims that surviving a drought requires an extensive taproot, which completely fails to prove the botanist's conclusion.

Adım Adım Çözüm

1
Identify the premises and the conclusion of the argument.
Premise 1: Thrives in alkaline soil guarantees an extensive taproot. Premise 2: Silene deserti thrives in alkaline soil. Conclusion: Silene deserti survives prolonged drought.
Deconstructing the argument is the first step in identifying any deductive gaps.
2
Determine the intermediate inference supported by the premises.
Because Silene deserti thrives in alkaline soil, it can be logically deduced that it possesses an extensive taproot system.
This establishes exactly what is already proven about Silene deserti before attempting to validate the final conclusion.
3
Identify the logical gap between the intermediate inference and the final conclusion.
The argument establishes that the plant has an extensive taproot, but concludes it can survive droughts. The required sufficient assumption must bridge this gap: Extensive taproot guarantees survival during prolonged drought.
A sufficient assumption must guarantee the conclusion based entirely on the existing premises.
4
Evaluate the proposed assumption in the statement.
The statement proposes: Surviving prolonged drought guarantees an extensive taproot. This is the reverse of what is mathematically needed.
Reversing the necessary and sufficient conditions fails to guarantee the conclusion.

Anahtar Kavram

Identifying Illegal Reversals in Sufficient Assumptions
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Konular

Sufficient Assumption

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