GMAT vocabulary: logic and decisions.

Something that deviates from what is standard, normal, or expected

The star's unusual brightness was dismissed as an anomaly until a second telescope confirmed the observation.

Memory cueOne red apple in a perfect row of green apples is an anomaly: it breaks the expected pattern.

Based on random choice or personal whim, rather than reason or system

The grading system appeared arbitrary, with identical essays receiving wildly different marks from different reviewers.

Memory cueA blindfolded dart chooses the answer arbitrarily: by chance rather than reason.

Understood by few; mysterious or secret

The professor's lectures on arcane mathematical theories attracted only the most dedicated students.

Memory cueAn arcane book is locked in a secret room and understood by only a few.

The act of ascribing a work or remark to a particular author or source

The painting's attribution to Rembrandt has been questioned by several art historians who point to inconsistencies in technique.

Memory cueAttribution attaches a quotation or artwork to its claimed source.

A warning or proviso; a qualification or limitation

The study's authors included an important caveat: the results may not generalize to populations outside the sample.

Memory cueA caveat is a yellow warning sign attached to a claim.

An opinion formed on the basis of incomplete information; to form such an opinion

Without hard evidence, any explanation at this point is merely conjecture.

Memory cueConjecture sketches a conclusion in pencil because the evidence is incomplete.

A confusing and difficult problem or question

The energy crisis presents a conundrum: how to maintain growth while reducing emissions.

Memory cueA conundrum locks a difficult question inside a confusing puzzle box.

A mutual relationship or connection between two or more things, especially a statistical one

The study found a strong correlation between childhood reading habits and academic performance in college.

Memory cueCorrelation ties two changing measures together without proving one caused another.

Done or reached decisively and with authority; providing a final, authoritative answer

Her biography of the composer is widely regarded as the definitive account of his life and work.

Memory cueA definitive answer stamps the question FINAL with decisive authority.

To identify the nature of a problem or condition through examination

Early efforts to diagnose the disease were hampered by the similarity of its symptoms to several common infections.

Memory cueTo diagnose a malfunction, examine symptoms and identify its true nature.

A division or contrast between two things represented as being opposed or entirely different

The dichotomy between rural and urban values has long shaped political discourse.

Memory cueA dichotomy draws one dividing line between two supposedly opposed sides.

Perceive or recognize clearly; distinguish with difficulty

Only a trained eye can discern the subtle differences between the genuine artifact and the forgery.

Memory cueUse a magnifying glass in fog to discern the faint shape with effort.

Having or showing good judgment; perceptive

The discerning reader will notice subtle allusions to classical mythology throughout the novel.

Memory cueA discerning judge separates the excellent choice from nearly identical alternatives.

A lack of agreement or consistency between facts or claims

The discrepancy between the official statistics and the independent survey raised questions about data collection methods.

Memory cueA discrepancy appears when two supposedly matching facts fail to line up.

The ability to produce a desired or intended result; effectiveness

Clinical trials are required to demonstrate the efficacy of a new drug before it can be approved.

Memory cueEfficacy asks one practical question: did it produce the intended result?

Based on observation or experience rather than theory or pure logic

The hypothesis, however elegant, must be supported by empirical evidence before it can be accepted as theory.

Memory cueEmpirical knowledge wears muddy field boots because it comes from observation and experience, not theory alone.

The condition of being equal or interchangeable in value, function, or meaning

The mathematician proved the equivalence of the two theorems, showing that each could be derived from the other.

Memory cueEquivalence places two things on equal, interchangeable sides of a balance.

Wrong; incorrect; based on error

The map was based on erroneous survey data, placing the mountain range nearly fifty miles from its actual location.

Memory cueAn erroneous answer grows from an error and is therefore wrong.

Intended for or understood by only a small number of people with specialized knowledge

The journal publishes articles on topics so esoteric that its readership numbers in the low hundreds.

Memory cueAn esoteric book opens only for the few people holding its specialized key.

Based on or derived from experience rather than theory

The program emphasizes experiential learning, placing students in real-world settings rather than traditional classrooms.

Memory cueExperiential knowledge comes from doing and experiencing, not merely theorizing.

To understand (a difficult problem or enigmatic person) after much thought

Economists still struggle to fathom how the obscure financial instrument triggered a worldwide recession.

Memory cueLower a thinking line into a deep idea until its meaning is fully fathomed.

To pay attention to; to take notice of

Investors who failed to heed the economist's warnings about the housing bubble suffered catastrophic losses.

Memory cueTo heed a warning, pay attention and act on its message.

Proposed explanations or assumptions made on the basis of limited evidence, to be tested further

Several competing hypotheses have been proposed to explain the sudden disappearance of the Mayan civilization.

Memory cueHypotheses are provisional explanations waiting for evidence to test them.

Supposed but not necessarily true; based on or serving as a hypothesis

The philosopher posed a hypothetical scenario involving a runaway trolley to illustrate competing ethical frameworks.

Memory cueA hypothetical situation floats inside an IF thought bubble rather than reality.

To light up; to clarify or make understandable

The newly translated documents illuminate aspects of medieval life that were previously understood only through speculation.

Memory cueA lamp can illuminate a room; an explanation can illuminate an idea.

To clarify, explain, or shed light on a subject

The discovery of the private diaries illuminated the writer's creative process in ways her published work never could.

Memory cueThe evidence illuminated the mystery by casting clarifying light on it.

When looking back on a past event or situation; with hindsight

In retrospect, the warning signs of the financial crisis were abundant, but few analysts connected the dots at the time.

Memory cueIn retrospect, turn around mentally and inspect the past with hindsight.

Not leading to a firm conclusion; not decisive

The autopsy results were inconclusive, leaving investigators without a definitive cause of death.

Memory cueInconclusive evidence ends with a question mark instead of a final verdict.

Inborn; natural; existing from birth rather than acquired

The debate over whether musical ability is innate or acquired has persisted for centuries without a definitive answer.

Memory cueAn innate ability arrives at birth rather than through later training.

Relating to or prompted by instinct; done without conscious thought; innate

The goalkeeper's instinctive dive to the left saved what would have been the winning goal.

Memory cueAn instinctive reaction fires before conscious thought can begin.

Knowledge or insight gained without conscious reasoning; instinctive understanding

The detective's intuition told her something was wrong with the alibi, long before the evidence confirmed it.

Memory cueIntuition reaches an insight without showing the steps of conscious reasoning.

Statistical analyses that combine the results of multiple scientific studies

Several meta-analyses combining data from hundreds of studies have confirmed the treatment's effectiveness.

Memory cueMeta-analyses gather many studies and statistically combine their results.

A view or opinion that is incorrect because it is based on faulty thinking or understanding

A common misconception about evolution is that it implies a progression from 'lower' to 'higher' organisms.

Memory cueA misconception is understanding aimed in the wrong direction.

Subtle differences or distinctions in meaning, expression, or tone

The translator captured not just the words but the cultural nuances that gave the original text its richness.

Memory cueNuances are fine shades of difference visible only through close attention.

Placed together; associated with

The exhibit paired each historical photograph with a contemporary image of the same location, revealing dramatic changes.

Memory cuePaired objects are joined as a deliberate set of two.

A typical example or pattern of something; a model or framework

The discovery forced scientists to adopt an entirely new paradigm for understanding the phenomenon.

Memory cueA paradigm is the model pattern through which others understand a field.

A seemingly contradictory or absurd statement or situation that may nonetheless be true

The paradox of thrift—that saving more individually can harm the economy collectively—puzzled economists for decades.

Memory cueA paradox looks self-contradictory yet may conceal a genuine truth.

Relating to; having relevance to

All documents pertaining to the acquisition must be submitted to the regulatory agency within thirty days.

Memory cueA fact pertaining to the case directly relates to it.

Observable events or occurrences, especially ones whose causes are in question

The aurora borealis is one of nature's most spectacular phenomena, produced by charged particles striking the atmosphere.

Memory cuePhenomena are observable events waiting for explanation.

A proposition from which another is inferred or follows as a conclusion; the basis of an argument

The entire argument rests on a premise that the author never actually defends—that human nature is fundamentally selfish.

Memory cueA premise is the starting platform from which an argument’s conclusion rises.

A belief accepted as true without proof; an assumption

The legal system operates on the presumption that a defendant is innocent until proven guilty beyond a reasonable doubt.

Memory cueA presumption takes a belief as true before proof arrives.

Accurately predicting or foretelling the future

The ecologist's warnings about deforestation, dismissed as alarmist in the 1970s, now seem grimly prophetic.

Memory cueA prophetic statement accurately sees an event before the future arrives.

To make compatible; to bring into harmony; to settle or resolve

The historian struggled to reconcile the conflicting eyewitness accounts of the battle into a single coherent narrative.

Memory cueReconcile two former rivals by repairing their broken handshake.

Not or no longer needed or useful; superfluous

The editor removed several redundant paragraphs that restated points already made more effectively earlier in the essay.

Memory cueA redundant piece remains after the puzzle is complete, extra and no longer useful.

To prove a statement or theory to be wrong or false

The archaeologist presented compelling evidence to refute the long-standing claim that the site was a ceremonial center.

Memory cueRefute a false claim by striking it with decisive contrary evidence.

Looking back on or dealing with past events; an exhibition showing an artist's lifetime work

The museum's retrospective of the painter's work revealed an artistic evolution that spanned six distinct periods.

Memory cueA retrospective turns its gallery lights backward onto past work or events.

Based on conjecture or theory rather than firm evidence; tentative

The final chapter ventures into speculative territory, imagining how the technology might evolve over the next century.

Memory cueA speculative claim is penciled in because evidence remains uncertain.

A widely held but irrational belief in supernatural influences

The scientist's mission was to replace superstition with evidence-based understanding in public health practices.

Memory cueSuperstition treats an irrational supernatural belief as a rule of reality.

The combination of separate elements into a coherent whole

The book is a masterful synthesis of economics, sociology, and political science applied to the problem of inequality.

Memory cueSynthesis weaves separate strands into one coherent fabric.

Not able to be maintained or defended against attack or objection

New evidence rendered the prosecution's theory untenable.

Memory cueAn untenable position cannot be defended when objections attack.