Thesis statement: Using the Internet gives young adults increased literacy but also leads to health problems and isolation from other people.

Evidence: In Brennan’s study, business people between the ages of 35 and 50 reported spending 10 to 12 hours a day online, thus severely impacting the time they spent with colleagues and family.

Is this evidence effective/ineffective?

Question

Thesis statement: Using the Internet gives young adults increased literacy but also leads to health problems and isolation from other people.

Evidence: In Brennan’s study, business people between the ages of 35 and 50 reported spending 10 to 12 hours a day online, thus severely impacting the time they spent with colleagues and family.

Is this evidence effective/ineffective?

BlackTom AI · Accepted Answer

The evidence is ineffective because it fails to match the thesis population, lacks linkage to key claims, and does not establish causation or scope.

1) Relevant knowledge points and concepts
- Relevance: Evidence must address the same population (young adults) and the same claims (increased literacy; health problems; social isolation).
- Representativeness/external validity: A sample must be appropriate and generalizable to the thesis group.
- Causation vs. correlation: To claim an effect (e.g., Internet use causes isolation or health problems), the study must rule out alternative explanations.
- Completeness: Evidence should cover the facets of the thesis (both literacy and health/isolation) or be part of a balanced set of supporting studies.

2) Step-by-step reasoning
- Thesis targets young adults. The cited study surveyed business people aged 35–50. Step: Compare populations — 35–50 is not “young adults,” so the sample does not directly support claims about young adults.
- Thesis claims increased literacy plus health problems and isolation. Step: Examine what the evidence reports — 10–12 hours online and reduced time with colleagues/family. This only addresses social isolation (partially) and not literacy or health.
- The wording “thus severely impacting” implies causation. Step: Determine whether the study design supports causation — the brief description provides no randomization, control, or longitudinal analysis, so causality is not established.
- Representativeness question: We are not told sample size, sampling method, or context; step: without those details, generalization is weak.

3) Calculations/intermediate steps
- None required; reasoning is conceptual and comparative.

4) Why the correct answer is correct
- The evidence fails on three counts: wrong age group, incomplete coverage of the thesis claims (no data on literacy or health), and an unsupported causal claim. Therefore it does not effectively support the thesis.

5) Why the other option is incorrect
- "Effective" would require direct, relevant data on young adults and measures of literacy and health or rigorous causal evidence. The cited study does not provide that, so “Effective” is not justified.

6) Conclusion
- Given the age mismatch, limited scope, and lack of causal support, the correct evaluation is Ineffective, matching the provided answer.

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Question 30 Choose a, b, c or d as the best answer. The author’s main argument is that the 100:80:100 model __________.

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