Main Ideas & Inferences

Main idea, details, inference, purpose and tone, vocabulary in context and relationships.

Worked Examples

<details> <summary><b>Example 1: An informational passage with a pivot</b></summary>

Passage:

For most of the twentieth century, city planners treated street trees as decoration: pleasant to look at, but the first thing cut when budgets tightened. That view is changing. Studies in several cities have found that blocks with a mature tree canopy stay noticeably cooler on summer afternoons than treeless blocks nearby. Trees also slow storm runoff by catching rain in their leaves, which eases pressure on aging sewers. Some planners now list trees alongside pipes and pavement as part of a city's basic infrastructure.

Question: Which choice best states the main idea of the passage?

• A. Street trees catch rainwater in their leaves during storms.
• B. Cities around the world should plant more trees than they cut down.
• C. Street trees are increasingly valued as useful infrastructure, not mere decoration.
• D. Twentieth-century planners cut trees whenever their budgets tightened.

Solution:

1. Pivot: "That view is changing" tells you the main idea is the new view.
2. Whole-passage test: cooling, runoff, and the closing "basic infrastructure" all support the claim that trees are useful.
3. Eliminate by trap type: A is too narrow (one supporting detail). B is too broad ("around the world") and adds a recommendation the passage never makes. D is background, the old view the passage moves away from.

Answer: C ✓

</details> <details> <summary><b>Example 2: The main focus of a prose-fiction passage</b></summary>

Passage:

Theo arrived at the music building forty minutes before his audition and found an empty practice room. He tuned his violin, then tuned it again. He played the opening of the sonata once, perfectly, and set the bow down rather than risk playing it a second time. When a door opened somewhere down the hall, he stood so quickly that the music stand tipped over.

Question: The passage mainly focuses on:

• A. Theo's nervous anticipation before an important performance.
• B. the layout of the practice rooms in the music building.
• C. Theo's skill at playing the opening of a difficult sonata.
• D. Theo's dislike of the piece he has been asked to perform.

Solution:

1. Track what the details share: arriving very early, tuning twice, refusing to play again, jumping at a sound. Every detail shows nerves.
2. Eliminate: B is background (the room is just the setting). C is too narrow: he plays one passage well, but the passage is about his state of mind, not his ability. D is unsupported; nothing suggests he dislikes the sonata.

Answer: A ✓

Skill: In fiction, name the feeling or situation that every detail points toward.

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Key Takeaways

• Detail answers are in the passage: find the sentence, then match its meaning, not its words.
• Use names, numbers, dates, and unusual terms as search words, and read the sentences around them.
• Avoid right words / wrong meaning, true but not the answer, plausible but unstated, wrong time or person, and scope shifts.
• Evidence shows a claim is true; an explanation says why it might be; context describes the setting or study.
• To find a detail's role, name the claim it supports and the kind of support (example, statistic, personal or expert quotation, contrast).
• On EXCEPT questions, cross off every choice you can find; the survivor is not in the passage.

Worked Examples

<details> <summary><b>Example 1: A character inference from combined clues</b></summary>

Passage:

Elena set two cups on the table out of habit, then put one back in the cabinet. The kettle whistled. On the windowsill, her husband's reading glasses lay folded on top of a crossword, half-finished in his small, careful handwriting, exactly where they had been since March.

Question: The passage most strongly suggests that Elena:

• A. dislikes crossword puzzles and plans to throw this one away.
• B. is expecting a guest to join her for tea in a few minutes.
• C. is adjusting to her husband's absence from her daily routine.
• D. has asked her husband several times to put away his glasses.

Solution:

1. Combine clues: a second cup set out "out of habit" and then put away; his glasses and crossword untouched "since March."
2. Inference: her husband used to share this routine and is no longer there. The passage doesn't say why, so the safest answer names the absence, not a cause.
3. Eliminate: A and D add motives the passage never gives. B contradicts the cup being put back.

Answer: C ✓

</details> <details> <summary><b>Example 2: Logic from a signal word</b></summary>

Passage:

By 1930, the Ridley Theater no longer showed silent films. Its organist, who had played along with every picture for twelve years, was offered a job as the building's night manager.

Question: It can most reasonably be inferred that:

• A. the organist had been a poor musician for most of those twelve years.
• B. every theater in the city stopped showing films in 1930.
• C. the organist turned down the job of night manager.
• D. the organist's original job was no longer needed at the theater.

Solution:

1. "No longer" tells you the theater used to show silent films, and the organist played along with them.
2. Once silent films stopped, the job of playing along with them disappeared, which is why he was offered a different job.
3. Eliminate: A gives an unstated reason. B is too extreme and shifts from "silent films" to "films." C predicts a decision the passage never reports.

Answer: D ✓

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Worked Examples

<details> <summary><b>Example 1: Purpose with a verb and a subject</b></summary>

Passage:

Most of us throw away a cracked phone screen, a wobbly chair, or a toaster that won't pop. Repair cafés, volunteer-run events where neighbors fix broken items together, offer another path. They keep usable goods out of landfills, teach skills that once passed from parent to child, and, not least, turn a frustrating chore into an afternoon of conversation. Every town with a library and a few handy residents could host one.

Question: The author's main purpose is to:

• A. explain the history of household repair from one generation to the next.
• B. describe the steps for fixing a cracked phone screen at home.
• C. criticize people who throw away items that are broken.
• D. encourage readers to see repair cafés as worthwhile and easy to start.

Solution:

1. Verb family: The author lists benefits and ends with "Every town ... could host one," so the passage is for something: a persuasive purpose.
2. Subject: repair cafés, the topic of every sentence after the first.
3. Eliminate: A gets the verb family wrong (neutral) and the subject too narrow. B is too narrow and gives no steps. C has the wrong target: the author says "most of us" and doesn't blame anyone.

Answer: D ✓

</details> <details> <summary><b>Example 2: Tone from diction, including irony</b></summary>

Passage:

The city's new parking app is a marvel of modern design. In only seven screens, it lets drivers enter a zone number, confirm the zone number, and then receive a message that the zone number cannot be verified.

Question: The author's tone is best described as:

• A. sincerely impressed.
• B. wryly critical.
• C. neutral and informative.
• D. bitterly furious.

Solution:

1. "Marvel of modern design" sounds like praise, but the details (seven screens, repeating the zone number, failure) undercut it. The praise is ironic.
2. Intensity: The humor is dry and light, not enraged.
3. Eliminate: A misses the irony. C ignores the loaded wording. D is too extreme for a joke about an app.

Answer: B ✓

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Worked Examples

<details> <summary><b>Example 1: A contrast clue</b></summary>

Sentence:

Although the committee's first report was sweeping, recommending changes to nearly every department, its final report was narrow: it proposed revising a single form.

Question: As it is used in the sentence, "sweeping" most nearly means:

• A. cleaning with a broom.
• B. winning by a wide margin.
• C. wide-ranging.
• D. curving gracefully.

Solution:

1. Predict: "Although" sets the first report against a "narrow" final one, and "changes to nearly every department" restates the idea, so the word means broad.
2. Match: "wide-ranging." ✓
3. Eliminate: A is the literal, most common meaning. B fits "a sweeping victory," and D fits "a sweeping gesture," but neither describes a report's scope.

Answer: C ✓

</details> <details> <summary><b>Example 2: A restatement clue after a colon</b></summary>

Sentence:

The scientist's conclusions were qualified: she noted that the results applied only to adult mice and might not hold for other species.

Question: As it is used in the sentence, "qualified" most nearly means:

• A. limited by conditions.
• B. properly certified.
• C. highly skilled.
• D. eligible to compete.

Solution:

1. Read past the colon: the clause lists limits ("only to adult mice," "might not hold").
2. Substitute: "Her conclusions were limited by conditions" matches the explanation.
3. Eliminate: B, C, and D describe a person's credentials, not conclusions, and they ignore the colon's restatement.

Answer: A ✓

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Worked Examples

<details> <summary><b>Example 1: Sequence and point of view in a flashback</b></summary>

Passage:

I found the compass in a shoebox the week we sold my father's house. He had carried it across three continents before I was born, and when I was ten he had taught me to use it on a muddy trail behind our school, patiently, while I complained about my wet socks. I didn't understand then why he cared so much that I learn. Holding it now, with its needle still trembling north, I think he was giving me a way to find my way back.

Question 1: Which event happens first chronologically?

• A. The narrator finds the compass in a shoebox.
• B. The father teaches the narrator to use the compass.
• C. The father carries the compass across three continents.
• D. The family sells the father's house.

Question 2: The narrator's point of view is best described as that of:

• A. an adult reflecting on a childhood memory with new understanding.
• B. a ten-year-old describing a hike as it happens.
• C. an outside observer reporting a father's travels.
• D. the father explaining why he taught his child.

Solution:

1. Timeline: "before I was born" puts the travels earliest; the lesson at age ten comes next; finding the compass and selling the house happen in the present. Q1: C ✓
2. Point of view: "I didn't understand then" and "Holding it now" show an adult looking back and understanding more than the child did. Q2: A ✓

</details> <details> <summary><b>Example 2: The function of a paragraph</b></summary>

Passage (summarized by paragraph):

• P1: Many cities have repealed parking minimums, rules requiring new buildings to include a set number of parking spaces.
• P2: Supporters of the change say the rules raised the cost of housing because each space adds to construction costs.
• P3: Critics warn that without the rules, drivers will circle neighborhoods looking for street parking.
• P4: Early data from two cities show little change in street-parking demand since the rules ended.

Question: The third paragraph primarily serves to:

• A. provide the main evidence for the author's argument.
• B. present a concern that the fourth paragraph then addresses.
• C. explain why parking spaces add to construction costs.
• D. introduce the topic of the passage for the first time.

Solution:

1. Relationship: P3 raises a worry ("Critics warn"); P4 answers it with data.
2. Eliminate: A: P3 is an objection, not evidence. C is P2's job. D is P1's job.

Answer: B ✓

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Worked Examples

<details> <summary><b>Example 1: Margin notes that pay off</b></summary>

Mini-passage:

[1] The lighthouse on Gull Point went dark in 1964, replaced by an automatic beacon on a steel tower. [2] For thirty years the old tower stood empty, and storms stripped its paint. [3] Then a group of retired fishermen formed a society to restore it, raising money one bake sale at a time. [4] Today the light shines again, not to guide ships, which no longer need it, but as a museum that draws schoolchildren from across the county.

Notes a strong reader writes:

• [1] light replaced by machine
• [2] decline: empty, stripped
• [3] pivot ("Then"): fishermen restore
• [4] now a museum, not for ships

Payoff: The notes answer three kinds of questions before you read the choices. Main idea: a retired lighthouse was rescued by locals and given a new purpose. Sequence: automation → decline → restoration → museum. Inference: "which no longer need it" implies ships rely on the automatic beacon.

</details> <details> <summary><b>Example 2: Triage a question set</b></summary>

A passage set gives you these six stems. In what order should you work them?

1. "The passage mainly focuses on..."
2. "As it is used in paragraph 3, the word 'keen' most nearly means..."
3. "According to paragraph 5, the society raised money by..."
4. "The narrator's attitude toward her uncle is best described as..."
5. "The fourth paragraph primarily serves to..."
6. "It can reasonably be inferred that the uncle..."

Order: 2 and 3 first (they point to a specific paragraph and are quick) → 5 and 6 (function and inference, rereading the paragraphs involved) → 4 and 1 last (whole-passage judgments).

Why it works: The quick questions take you back into the text and refresh details you'll need for the broad ones, and you bank sure points before tackling the hardest judgments.

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