CAT RC question types: how to recognise and answer each one

A CAT RC passage usually comes with four questions, and they are rarely four of the same kind. One asks for the central idea, another for a detail, a third for what the author would agree with, a fourth for why an example is there. Each type needs a slightly different move, and each has its favourite trap.

Recognising the type takes a few seconds and tells you exactly where to look and what kind of wrong answer to expect. This guide lists the types, then works through one example of each on a single original passage.

The types at a glance

The traps behind wrong options

Most wrong options fall into one of these six. Naming the trap is faster than arguing with the option.

The worked passage

An influential argument holds that any resource owned in common is doomed. If a pasture is open to all, each herder gains the full benefit of adding one more animal while bearing only a fraction of the damage from overgrazing; rational herders therefore keep adding animals until the pasture is ruined, an outcome often called the tragedy of the commons. The remedy, on this argument, is to divide the pasture into private plots or place it under state control.

The logic is tidy, and it describes some cases well: open-sea fisheries, where boats come and go without knowing one another, have often been exhausted in just this way. But field studies of village forests, irrigation channels and grazing lands have found many commons that have lasted for generations without either remedy. What these cases share is not an absence of self-interest but the presence of rules: who may take how much, when, and what happens to those who cheat.

The mistake in the original argument lies in its picture of the users. It imagines strangers who cannot talk to one another. Real users of a village commons meet at weddings and markets, remember who took more than their share last season, and have ways of making that memory costly. Where those conditions hold, self-governance can work; where users are many, mobile and anonymous, the original warning still applies.

The lesson is not that the tragedy is a myth, but that it is a prediction about a particular kind of community rather than a law of nature.

Map: (1) the argument and its remedies; (2) where it holds, and counter-cases with rules; (3) the flaw: it assumes strangers; (4) author's view: a conditional prediction, not a law.

1. Main idea

Which of the following best captures the central idea of the passage?

(a) Shared resources are always overused unless they are privatised or taken over by the state.
(b) Local communities manage resources better than states or markets.
(c) Overuse of a commons is likely where users are anonymous and lack enforceable rules, but it is not inevitable.
(d) The collapse of open-sea fisheries proves the argument about commons correct.

Answer: (c). It combines paragraphs 3 and 4. (a) is the argument the author qualifies (reversal). (b) is too broad; the passage never ranks communities above states or markets in general. (d) is too narrow: fisheries are one case the author concedes.

2. Detail

According to the passage, what did the long-lasting commons have in common?

(a) Users with little self-interest
(b) Supervision by the state
(c) A small physical size
(d) Rules on use and consequences for cheating

Answer: (d). Paragraph 2 says so directly. (a) is a reversal: "not an absence of self-interest". (b) contradicts "without either remedy". (c) is out of scope.

3. Inference

The author would expect a commons to be at greatest risk of overuse when its users:

(a) are numerous and change frequently.
(b) know one another well.
(c) depend on it for their living.
(d) are governed by a village council.

Answer: (a). Paragraph 3: "where users are many, mobile and anonymous, the original warning still applies." (b) and (d) describe the conditions under which self-governance works. (c) may be true of many commons but the passage never links dependence to overuse.

4. Tone

The author's attitude to the "influential argument" is best described as:

(a) dismissive.
(b) qualified acceptance.
(c) wholehearted endorsement.
(d) indifferent.

Answer: (b). The author says it "describes some cases well" and is "not a myth", but limits where it applies. (a) is too strong. (c) ignores the "mistake" the author identifies. (d) does not fit an author who engages with it closely.

5. Purpose

The author mentions open-sea fisheries in order to:

(a) prove that all commons eventually fail.
(b) introduce the main subject of the passage.
(c) recommend privatising fisheries.
(d) acknowledge a situation in which the argument holds.

Answer: (d). The example follows "it describes some cases well". (a) is too broad. (b) is wrong because the passage is about commons in general. (c) is out of scope: no recommendation is made.

6. Application

Which situation would the author most likely cite as an example of self-governance of a commons working?

(a) A lake fished by one village whose council sets seasonal limits and fines, and which remains well stocked
(b) A forest guarded by government officials
(c) A pasture divided into private plots
(d) An ocean fishing ground open to boats from many countries, now overfished

Answer: (a). It matches the principle: users who know each other, rules and penalties. (b) and (c) are the two remedies, not self-governance. (d) is an example of the tragedy itself.

7. "All except"

All of the following are stated or implied in the passage EXCEPT:

(a) Some commons have lasted for generations without privatisation or state control.
(b) The original argument assumes that users cannot communicate.
(c) Self-interest disappears among users of well-run commons.
(d) Communities can make the memory of past cheating costly.

Answer: (c). Paragraph 2 says the surviving commons show "not an absence of self-interest". Options (a), (b) and (d) are each supported by a specific line.

Practice set

A. Name the type. For each stem, say which type it is.

1. "The author refers to the 'office desks' most likely to…"
2. "Which of the following would the author be least likely to agree with?"
3. "The passage suggests that the early settlers…"
4. "Which of the following best describes the author's view of the new policy?"

B. Answer from the passage.

Schools that replaced handwriting with typing were responding to a sensible observation: most adult writing now happens on keyboards. Yet the case for handwriting was never mainly about the adult workplace. Forming letters by hand slows a child down, and the slowness has uses. A child copying a sentence by hand must hold it in mind, break it into parts and rebuild it; a child typing can transfer it almost without reading. Whether that difference matters for learning is an empirical question, and the evidence so far is mixed. But it is the right question, and it is not answered by pointing at office desks.

1. The author's main point is that:
   • (a) schools should return to teaching handwriting.
   • (b) the workplace argument for typing misses the question of how writing method affects learning.
   • (c) typing harms children's learning.
   • (d) adults no longer need handwriting.
2. The phrase "it is not answered by pointing at office desks" suggests that the author sees the schools' reasoning as:
   • (a) beside the real question.
   • (b) factually wrong.
   • (c) based on strong evidence about learning.
   • (d) the result of pressure from employers.

Answers to A:

1. Purpose.
2. Inference (an "except"-style version). Find the option that contradicts the author.
3. Inference. "Suggests" signals something implied, not stated.
4. Tone or attitude.

Answers to B:

1. (b). (a) goes further than the author, who calls the evidence mixed. (c) overclaims for the same reason. (d) restates the schools' observation, not the author's point.
2. (a). The author calls the observation "sensible", so (b) is a reversal. (c) is wrong because the author says the evidence on learning is mixed. (d) is out of scope.

What to do next

• For the next week, label the type of every RC question before you read its options.
• For every wrong option you reject, name the trap from the table above.
• Go deeper on the two hardest types: inference questions and tone and purpose.