City Official: Our new public transportation system, which includes expanded bus routes and a new light rail, was designed to reduce traffic congestion and carbon emissions. However, a recent analysis shows that traffic congestion has not decreased and carbon emissions have only marginally improved since the system's implementation. This indicates that public transportation systems are ineffective tools for achieving environmental and traffic goals.
- AThe new light rail line experiences frequent delays due to technical issues.
- BMany residents who previously used public transportation have now switched to ride-sharing services.
- CThe city's population has significantly increased since the new public transportation system was implemented.
- DA significant portion of the city's carbon emissions comes from industrial sources, not private vehicles.
Show answer & explanationAnswer & explanation
Correct answer: C. The city's population has significantly increased since the new public transportation system was implemented.
The official concludes that public transportation is ineffective because congestion and emissions haven't improved. However, if the city's population has significantly increased, then without the new system, congestion and emissions might have become much worse. The system could be effective in *preventing a worsening situation*, even if it hasn't achieved a net reduction, thus undermining the conclusion of ineffectiveness.
Why the other options are wrong
- A. This points to operational issues with the light rail, which might explain its limited impact, but doesn't challenge the overall effectiveness of public transport as a concept.
- B. This suggests a flaw in the system's design or appeal, which might explain why it's not working, but doesn't directly challenge the conclusion that it's an 'ineffective tool' in general.
- D. While true, this doesn't explain why *traffic congestion* hasn't decreased, and it doesn't preclude public transportation from being an effective tool for the carbon emissions *from private vehicles*.
Re-evaluating a Conclusion
Re-evaluating a conclusion involves considering new information or different perspectives that might lead to a different interpretation of the evidence, potentially undermining or altering the original conclusion.
- Challenges the original conclusion's validity.
- Often introduces an overlooked factor or alternative context.
- Requires assessing how new information impacts the logical leap.
Memory trick: Look again, connect the dots differently, and a new picture emerges.