Move from a precise evidence span to the smallest justified conclusion, without importing assumptions.
GRE General Test45 min study guide10 indexed sections
BY THE END, YOU CAN
Separate explicit statements from warranted inferences.
Preserve quantifiers, comparisons and conditions.
Evaluate each multiple-selection option independently.
Explain exactly why a plausible claim is not yet supported.
BEFORE YOU START
Understand basic conditional sentences.
Identify what pronouns and comparison words refer to.
Original educational lesson. Work through the examples before revealing the practice answers. This original lesson supports current GRE General Test study; it does not reproduce official questions, certify a writing score or predict test content.
LEARN THROUGH ORIGINAL PRACTICE
Original GRE-style worked examples and practice
All teaching passages, writing prompts, examples and exercises in this lesson are original. No official ETS questions, prompts or explanations are reproduced. Current structure and observed public sample metadata are separate from this original teaching; no official score or question probability is implied.
01 / UNDERSTAND & APPLY
What the passage commits you to
A detail question asks you to recover information stated in the passage, possibly expressed with different words. An inference question asks what follows from that information. Both are bounded by the text. An inference need not repeat a sentence, but it needs a defensible bridge from supplied facts to the proposed conclusion.
Treat outside knowledge as a comprehension aid, not an extra premise. Knowing that a species usually migrates cannot establish that a particular population migrated if the passage does not support it. All passages and problems here are original educational examples.
ORIGINAL WORKED EXAMPLE
Paraphrase without expansion
Original passage: The researchers excluded measurements collected during storms because water splashes interfered with the sensors. Select one stated reason for exclusion: A Storms changed the fish population; B Splashes disrupted measurement; C Sensors could not operate at night; D Researchers disliked rain; E Storm data were expensive.
Locate the explanation introduced by “because.”
“Interfered with the sensors” is accurately paraphrased by “disrupted measurement.”
Nothing identifies fish numbers, nighttime operation, personal preference or expense.
A is scientifically imaginable but lacks textual support.
Answer B.
02 / UNDERSTAND & APPLY
Infer only as far as the evidence carries you
Write an inference as premises followed by a conclusion. If a hidden premise does the real work, ask whether the text supplies it. “The device was unavailable before 1980” and “the laboratory used that device” support use no earlier than 1980. They do not establish that the laboratory opened in 1980.
Evidence can justify a possibility rather than a certainty. An observation inconsistent with one explanation may weaken that explanation without proving a competing one. Match the strength of your answer to the logical strength of the bridge.
ORIGINAL WORKED EXAMPLE
Time boundary
Original passage: The revised lens first became available in 1994. All photographs in the collection were taken with that revised lens. Select one inference: A The collection’s photographs were taken no earlier than 1994; B Every photograph was taken in 1994; C The photographer began working in 1994; D Earlier lenses were unusable; E The collection is complete.
Every photograph used a lens unavailable before 1994.
Therefore each photograph is from 1994 or later.
Availability establishes a lower time bound, not an exact date.
B, C, D and E add claims about exact timing, career history, quality or completeness.
Answer A.
03 / UNDERSTAND & APPLY
Some, most and all are different commitments
“Some” establishes at least one instance and does not by itself exclude all. “Most” means more than half in ordinary quantitative use, but does not specify the exact percentage. “Not all” establishes an exception; it does not mean none. “Few” is context-sensitive and should not be converted into an invented number.
The object of a quantifier matters. Most observed nests is not most nests in the forest. Some successful projects used volunteers does not imply most volunteer projects succeeded. Reverse conditional and reversed proportion traps often sound natural because they use the same words.
ORIGINAL WORKED EXAMPLE
An exception is enough
Original passage: Not every repaired instrument passed the final test. Select all supported statements from these three choices: A At least one repaired instrument failed to pass; B No repaired instrument passed; C Every instrument that passed was repaired.
Translate “not every” into the existence of at least one exception.
A expresses that exception.
B is stronger: failure by at least one does not establish failure by all.
C reverses the direction and adds a claim about instruments outside the repaired group.
Answer A only.
04 / UNDERSTAND & APPLY
Keep both sides and the measured variable
A comparative detail needs a baseline. “Route A is shorter than route B” does not establish that A is short in absolute terms. “Costs grew more slowly” can describe rising costs; it does not imply a decline. A proportion can increase while its underlying count falls if the total falls faster.
When a question concerns a comparison, restate it with both groups, the variable, and the period. This prevents drift from reported speed to efficiency, from average performance to every individual, or from relative change to absolute level.
ORIGINAL WORKED EXAMPLE
Slower growth is still growth
Original passage: Museum attendance rose by 4 percent this year, compared with 10 percent last year. Select one inference: A Attendance declined this year; B Attendance increased at a lower percentage rate this year; C Fewer people visited this year than last year; D Admission prices fell; E Attendance will fall next year.
The current rate is positive, so attendance rose.
Four percent is below ten percent, so the percentage growth rate slowed.
Neither prices nor future behavior is provided.
A and C confuse a smaller rate of increase with a smaller total.
Answer B.
05 / UNDERSTAND & APPLY
Necessary conditions and sufficient conditions
If every accepted submission includes a consent form, acceptance implies a form. A form is necessary for acceptance. It is not necessarily sufficient: a submission with a form might still be rejected for other reasons. Likewise, a form-free submission cannot be accepted under this rule. These are logical consequences of the stated condition, not general facts about real institutions.
Do not apply a rule beyond its scope. A rule for this year’s exhibition does not establish what happened last year. If the passage says a rule usually holds, treat exceptions as possible rather than reasoning as if the rule were universal.
ORIGINAL WORKED EXAMPLE
Reverse inference trap
Original passage: This year, the journal accepted a paper only if two reviewers recommended publication. Paper K was accepted this year. Select all supported statements: A Two reviewers recommended K; B Every paper recommended by two reviewers was accepted; C K satisfied at least one condition required for acceptance.
“Only if” introduces a necessary condition. Acceptance of K therefore entails two recommendations.
A follows, and C states the weaker fact that the required recommendation condition was met.
B turns a necessary condition into a guarantee; other conditions could exist.
Answer A and C.
06 / UNDERSTAND & APPLY
Answer each option on its own evidence
Reading Comprehension includes single-answer, multiple-answer and select-in-passage tasks. Read the directions before deciding how many responses to give. In a multiple-answer task, test each proposed statement independently; a correct first option does not imply that the remaining options must be false. Do not choose an unsupported option merely to create a pair.
For every choice, keep a short ledger: supported by this span, contradicted by this span, or not established. “Not established” is a valid reason to exclude an option even when it could be true. When selecting a sentence in a passage, identify the whole sentence requested, not just an attractive phrase inside a sentence with a different function.
A GRE Reading Comprehension multiple-answer item presents three choices. One, two or all three can be correct. To receive credit, select all correct choices and no incorrect choices; there is no partial credit for an incomplete selection. The single-answer format asks for one response, while select-in-passage asks for a sentence.
07 / UNDERSTAND & APPLY
Original practice: detail and bounded inference
Follow the selection count in each question.
ORIGINAL PRACTICE · 1
Original passage: Seeds from the northern site germinated later than seeds from the southern site under identical laboratory conditions. Select one supported statement: A All northern plants grow slowly; B Germination timing differed between the sampled groups; C Temperature caused the difference.
Reveal answer & reasoning
B.
B restates the measured difference within the sampled groups. A generalizes beyond germination and the sample. C invents a cause despite identical laboratory conditions.
ORIGINAL PRACTICE · 2
Original passage: Of the ten letters retained, three mention a planned journey. Select all supported statements: A At least three retained letters mention a journey; B The journey occurred; C Some retained letters do not mention the planned journey.
Reveal answer & reasoning
A and C.
Three of ten mention it, leaving seven that do not. A is a weaker supported count. Planning does not establish execution, so B is unsupported.
ORIGINAL PRACTICE · 3
Original passage: The bridge opened after the old ferry service ceased. Select one supported statement: A The two services operated simultaneously; B The ferry ceased before the bridge opened; C The bridge caused the ferry to cease.
Reveal answer & reasoning
B.
B reverses the temporal wording without changing the sequence. A conflicts with that sequence; C converts temporal order into causation.
ORIGINAL PRACTICE · 4
Original passage: Some paintings attributed to R. contain a pigment manufactured only after R.’s death. What minimum challenge to the attribution follows?
Reveal answer & reasoning
At least those paintings containing the later pigment require an explanation inconsistent with straightforward creation entirely by R. during R.’s lifetime.
The pigment creates a chronological difficulty, but later restoration could be relevant. The statement does not establish that every attribution is false or identify a forger.
08 / UNDERSTAND & APPLY
Original practice: reasoning with incomplete information
Identify the smallest defensible conclusion. Absence of evidence can be informative, but only when there is a reason to expect the evidence to appear.
ORIGINAL PRACTICE · 1
Original passage: The excavation report lists pottery and coins but says nothing about wooden tools. Select one: A No wooden tools existed; B The report does not establish whether wooden tools were present; C Wooden tools were more common than coins.
Reveal answer & reasoning
B.
Silence does not by itself prove absence, and no comparative quantity is supplied. Preservation and reporting practices could matter, but the passage does not settle them.
ORIGINAL PRACTICE · 2
Original passage: Every surveyed owner who installed the filter reported less sediment. Some surveyed owners did not install it. Select all supported statements: A All surveyed installers reported less sediment; B Noninstallers reported no change; C The filter caused the reported reduction.
Reveal answer & reasoning
A only.
A preserves the explicitly stated group and outcome. No outcome for noninstallers is given, and the observational report alone cannot establish causation.
ORIGINAL PRACTICE · 3
Original passage: During the festival, the share of visitors arriving by train rose, while the total number of visitors fell. Must the number arriving by train have risen?
Reveal answer & reasoning
No; the absolute number cannot be determined from those facts alone.
For example, 20 percent of 100 is 20 and 30 percent of 50 is 15; alternatively, 30 percent of 90 is 27. Both fit a higher share and a lower total. The inference needs the magnitudes.
ORIGINAL PRACTICE · 4
Original passage: The new reading room admits only registered researchers. Lina entered the reading room under this rule. Select one: A Lina was registered; B Every registered researcher entered; C Lina is a professional historian.
Reveal answer & reasoning
A.
Registration is necessary for admission. B reverses the condition, and C adds an occupational claim not entailed by registration.
09 / UNDERSTAND & APPLY
Developed original passage: integrate the full argument
The following passage and question are original educational material. Read the whole passage before answering; the five options deliberately differ in scope, attribution or argumentative role.
The Hillford archive contains inspection books from four mills operating along the same river. Earlier researchers counted each entry labeled “stoppage” as a day on which a mill produced nothing. A later archivist noticed that inspectors sometimes used that label when one wheel stopped even though a second wheel continued operating. The books do not consistently specify which wheel was affected. Consequently, the total number of stoppage entries cannot be converted directly into days of complete inactivity.
For one mill, however, a separate wage ledger survives. It records payments to workers assigned to the second wheel on several dates labeled as stoppages in the inspection book. These payments do not establish how much material the mill produced, since workers could have performed maintenance. They do provide an additional reason to question the assumption that every stoppage entry represented a wholly idle workforce. Comparable wage records have not been found for the other three mills. The archivist therefore treats the revised interpretation as a caution about the inspection category, rather than as a calculation of production for all four mills.
ORIGINAL WORKED EXAMPLE
A complete-passage worked analysis
Select exactly one inference best supported: A All stoppage entries refer to the first wheel. B Workers produced a normal day’s output on every date when wages were paid. C The inspection label alone is insufficient to determine days of complete inactivity. D The other three mills never kept wage records. E The archivist has determined total production for the four mills.
The first paragraph states that the label sometimes covered a partial stop and did not consistently identify the wheel.
Thus the same label can accompany different operational states; C follows without needing to decide what occurred on every day.
A universalizes “sometimes” and assigns a specific wheel not established.
B confuses payment with production, despite the stated maintenance possibility.
D confuses records not found with records never kept; E contradicts the conclusion’s explicit measurement limit.
Answer C.
10 / UNDERSTAND & APPLY
Make an error log about the missing link
When an answer is unsupported, name the exact added premise: “assumes plans were completed,” “assumes the sample represents the population,” or “assumes no mention means nonexistence.” Then revise the answer into a statement the passage does support. This trains the boundary between a reasonable story and a warranted inference.
On a timed question, return to the relevant lines rather than rereading indiscriminately. Verify the reference of pronouns and the sentence immediately around the evidence. A qualifying clause outside the highlighted phrase may determine the answer.
KEEP THE BIG IDEAS
Quick revision
Locate a precise evidence span before accepting an answer.
Keep quantifiers, time bounds, comparison baselines and conditional direction intact.
An inference can be true in the world yet unsupported by the passage.
Evaluate every multiple-answer choice independently; select only supported choices.
The teaching notes, passages, worked explanations and practice are original. Official references identify the assessment framework and skill scope; they do not endorse this lesson or license official question reproduction.
GRE analytics distinguish current test structure from a small independently classified public sample selection. Writing instruction has no observed prompt-frequency denominator. These are not historical administered-exam frequencies.