Necessary AssumptionDiff: Medium
Logic Breakdown
Passage Summary: Since speeding is a major reason for most car crashes, the author claims that if we put technology in every car to stop them from speeding, most crashes would be avoided.
Conclusion: Installing speed-limiting devices in all vehicles would prevent the majority of traffic accidents.
Reasoning: Many drivers exceed the speed limit, and speeding is a significant contributing factor in most accidents.
Analysis: For this Necessary Assumption question, we need to bridge the gap between a 'significant factor' and the actual prevention of the event. The argument assumes that if you remove the factor of speeding, the accident itself will no longer occur, rather than just happening at a slower speed. We must also assume that the speed-limiting devices won't be bypassed or rendered irrelevant by other factors. Look for an answer that confirms that preventing the speeding actually prevents the accident, rather than just changing its nature.
Conclusion: Installing speed-limiting devices in all vehicles would prevent the majority of traffic accidents.
Reasoning: Many drivers exceed the speed limit, and speeding is a significant contributing factor in most accidents.
Analysis: For this Necessary Assumption question, we need to bridge the gap between a 'significant factor' and the actual prevention of the event. The argument assumes that if you remove the factor of speeding, the accident itself will no longer occur, rather than just happening at a slower speed. We must also assume that the speed-limiting devices won't be bypassed or rendered irrelevant by other factors. Look for an answer that confirms that preventing the speeding actually prevents the accident, rather than just changing its nature.
Passage Stimulus
Passage Redacted
Unlock Full Passage2.Which one of the following is an assumption on which the argument depends?
Correct Answer
C
C is necessary. If drivers seldom need to exceed the limit to avoid accidents when others aren’t speeding, then preventing speeding won’t itself cause accidents and can plausibly prevent most accidents in which speeding is a significant factor. Negation test: If drivers often need to exceed the limit to avoid an accident even when others aren’t speeding, then the devices would cause or fail to prevent many accidents, collapsing the conclusion.
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