medium · LSAT Logical Reasoning
A clinical guideline is adopted only if supported by two independent trials. Guideline G cites two trials, but both used the same patient registry. Therefore G will not be adopted.
Which one of the following, if assumed, enables the conclusion to be properly drawn?
- These are G's only trials, and same-registry trials are dependent.
- Independent trials need not use identical outcome measures.
- Guideline G concerns a common condition.
- Registry studies can reveal rare adverse events.
- Trials using the same patient registry are generally less persuasive than trials using different registries.
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