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Argument Structure

Premise 1: Smallpox is a highly lethal disease (historically killing up to 50% of local populations).
Premise 2: The only remaining cultures are in two high-security labs.
Counter-Premise (The Risk): Some scientists want to destroy them because humans are still susceptible (the "Risk").
Premise 3: Research on these cultures may lead to future benefits for humans.
Conclusion: Therefore, the cultures should not be destroyed.


The Logical Gap

The ecologist is betting that the potential benefit (may lead to breakthroughs) is greater than the certain risk (susceptibility/accidental release).
To Strengthen this, you must either:
Increase the probability/value of the Benefit.
Decrease the probability/severity of the Risk.


Why Option B Wins

Option B addresses the gap directly by comparing the two probabilities. It explicitly states that the Benefit (Breakthrough) > Risk (Accidental Release). This provides the logical "weight" needed to tip the scale in favor of the ecologist's conclusion.
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