Information and IdeasVery hardFinding that weakens a claim about a cause
Information and Ideas practice question
A council claims that its new recycling campaign increased the amount of glass recycled, since glass collections rose by 30% in the three months after the campaign.
Which finding, if true, would most directly weaken the council's claim?
- A. During those three months the council also began collecting glass from restaurants and pubs, which had previously disposed of it privately.Correct
- B. The campaign used posters and leaflets.
- C. Residents said the campaign was clear.
- D. Glass is collected fortnightly.
Answer: A. During those three months the council also began collecting glass from restaurants and pubs, which had previously disposed of it privately.
A new source of glass in the collections explains the rise without any change in residents' behaviour.
Why the other answers are wrong
- B. The campaign used posters and leaflets.
- Describes the campaign, not its effect.
- C. Residents said the campaign was clear.
- Clarity doesn't show it changed behaviour.
- D. Glass is collected fortnightly.
- Frequency is irrelevant.
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