Sufficient AssumptionDiff: Medium
Logic Breakdown
Passage Summary: A group's report won't work unless they all sound like they agree. Since the members have already gone on the news to give their own separate opinions, the report is doomed to fail.
Conclusion: The commission's report on disaster preparedness will not be effective.
Reasoning: A report is only effective if the commission speaks with a unified voice, but individual members have already shared their personal opinions in the media.
Analysis: This argument sets up a conditional requirement: Effectiveness requires a Unified Voice (E -> UV). The author concludes the report won't be effective (~E) because members have expressed individual opinions. The 'gap' here is between 'expressing individual opinions' and 'failing to speak with a unified voice.' To make this argument logically airtight, we need an assumption that bridges this gap. Look for an answer that states that if members express individual opinions before a report is finished, the commission cannot—by definition—speak with a unified voice.
Conclusion: The commission's report on disaster preparedness will not be effective.
Reasoning: A report is only effective if the commission speaks with a unified voice, but individual members have already shared their personal opinions in the media.
Analysis: This argument sets up a conditional requirement: Effectiveness requires a Unified Voice (E -> UV). The author concludes the report won't be effective (~E) because members have expressed individual opinions. The 'gap' here is between 'expressing individual opinions' and 'failing to speak with a unified voice.' To make this argument logically airtight, we need an assumption that bridges this gap. Look for an answer that states that if members express individual opinions before a report is finished, the commission cannot—by definition—speak with a unified voice.
Passage Stimulus
Passage Redacted
Unlock Full Passage5.The conclusion of the argument follows logically if which one of the following is assumed?
Correct Answer
C
C provides the needed conditional link: if the commission can speak with a unified voice only if members’ opinions are not made public before completion, then the fact that members did make their opinions public ensures the commission is not unified, which (by the original unless-statement’s contrapositive) guarantees the report will not be effective.
Upgrade Your Prep
Ready to go beyond free explanations?
LSAT Perfection is the #1 modern LSAT prep platform, trusted by thousands of students for comprehensive test strategies, advanced drilling, and full analytics on every PrepTest.
Detailed explanations for 59 PrepTests
Advanced drillset builder
Personalized analytics
Built-in Wrong Answer Journal