According to the protocol of the Highfield Agricultural Research Station, every wheat cultivar that demonstrates drought resistance is selected for regional field trials. In addition, no wheat cultivar selected for regional field trials is treated with synthetic nitrogen fertilizers during testing. A newly developed cultivar, Solstice-9, demonstrated drought resistance at the station.
If the statements above are true, which one of the following must also be true on the basis of them?
- AAny wheat cultivar at the station that is not treated with synthetic nitrogen fertilizers demonstrates drought resistance.
- BA wheat cultivar must demonstrate drought resistance in order to avoid treatment with synthetic nitrogen fertilizers.
- Solstice-9 is not treated with synthetic nitrogen fertilizers during testing.Cevap
- DSolstice-9 is the only wheat cultivar at the station that demonstrated drought resistance this season.
- ESolstice-9 will produce a higher crop yield during regional field trials than cultivars that lack drought resistance.
Cevap
Solstice-9 is not treated with synthetic nitrogen fertilizers during testing.
The stimulus establishes a transitive conditional chain: drought resistance guarantees selection for regional field trials, and selection for field trials guarantees that no synthetic nitrogen fertilizer is applied during testing. Since Solstice-9 possesses drought resistance, it necessarily follows that Solstice-9 is not treated with synthetic nitrogen fertilizers during testing.
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Anahtar Kavram
Two-step conditional chaining and deductive instantiation
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