Worked Examples: Putting It All Together

This lesson brings together every analytical skill covered in this course — identifying arguments, conclusions, premises, assumptions, flaws, and evaluating evidence — by working through complete LNAT-style passages with step-by-step analysis. Each example demonstrates how to approach a passage systematically and how different question types draw on different skills.

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How to Approach an LNAT Section A Passage

Before working through the examples, here is the systematic approach you should use for every passage:

Step	Action	Time guidance
1	Read the passage carefully — understand the topic, the author's position, and the overall structure	60–90 seconds
2	Identify the main conclusion — what is the author ultimately arguing?	During first read
3	Identify key premises and evidence — what reasons does the author provide?	During first read
4	Note any assumptions, flaws, or missing information — what is taken for granted? What is left out?	During first read
5	Read each question carefully — ensure you understand exactly what is being asked	10–15 seconds per question
6	Eliminate wrong answers — use your analysis to rule out options before selecting the best answer	20–30 seconds per question

Timing Reminder: LNAT Section A gives you 95 minutes for 42 questions based on 12 passages. That is approximately 8 minutes per passage (including questions), or about 2 minutes 15 seconds per question. Efficient reading and systematic analysis are essential.

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Worked Example 1: Identifying the Main Conclusion

Passage

"The United Kingdom's first-past-the-post electoral system is often criticised for producing parliaments that do not reflect the share of votes each party receives. In the 2019 general election, the Liberal Democrats received 11.6% of the vote but won only 1.7% of the seats. Supporters of proportional representation argue that this is fundamentally unfair. However, first-past-the-post has a significant advantage: it almost always produces a clear majority government, which provides stability and decisive governance. Coalition governments, common under proportional systems, frequently lead to political paralysis and policy compromise. Given that effective governance requires the ability to make difficult decisions swiftly, the stability provided by first-past-the-post outweighs its representational shortcomings."

Analysis

Step 1 — Topic: Electoral systems. The author is defending first-past-the-post (FPTP) against critics who favour proportional representation (PR).

Step 2 — Main conclusion: "The stability provided by first-past-the-post outweighs its representational shortcomings."

Note that this is the final claim that everything else supports. It is not simply "FPTP produces stable majorities" (that is a premise) nor "PR leads to paralysis" (that is also a premise).

Step 3 — Premises:

• FPTP almost always produces a clear majority government
• Majority governments provide stability and decisive governance
• Coalition governments frequently lead to political paralysis and policy compromise
• Effective governance requires the ability to make difficult decisions swiftly

Step 4 — Assumptions:

• Political stability and decisive governance are more important than proportional representation
• Coalition governments are inherently less effective than single-party majority governments
• "Political paralysis" is a general feature of coalitions, not just an occasional one

Question: Which of the following best expresses the author's main conclusion?

A. The first-past-the-post system does not accurately reflect how people vote. B. Coalition governments lead to political paralysis. C. The advantages of first-past-the-post in producing stable governance outweigh its failure to represent vote shares proportionally. D. Proportional representation is a fairer electoral system than first-past-the-post.

Answer: C. This accurately captures the main conclusion. Option A is a premise acknowledged by the author. Option B is a supporting premise. Option D is the opposing view that the author is arguing against.

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Worked Example 2: Identifying a Flaw

Passage

"The rise in childhood obesity correlates closely with the rise in screen time over the past two decades. As children spend more hours watching television and using tablets, they spend fewer hours engaged in physical activity. It is clear that screen time is the primary cause of childhood obesity. Parents who want healthy children should therefore strictly limit their children's access to screens."

Analysis

Main conclusion: Parents should strictly limit screen time to prevent childhood obesity.

Key premise: Screen time correlates with obesity; more screen time means less physical activity.

Flaw identification:

The author commits the correlation-causation error. The correlation between screen time and obesity does not establish that screen time causes obesity. Other factors have also changed over the past two decades — changes in diet (more processed food, larger portion sizes), reductions in school sports provision, and changes in urban design that limit outdoor play.