LSAT Vocabulary

Aberrant

Markedly different from an accepted norm or standard.

Similar definitions: deviant, anomalous, atypical

Example: "The scientist's          findings contradicted decades of established research in the field."

Ad hominem

A logical fallacy that attacks a person's character or motives instead of addressing the substance of their argument.

Similar definitions: personal attack, character attack

Example: "Dismissing the researcher's findings because she lacks a doctoral degree is an          argument rather than a substantive critique."

Advocate

To publicly support or recommend a particular cause, policy, or course of action; also, a person who does so.

Similar definitions: champion, promote, endorse

Example: "The senator continued to          for stricter environmental regulations despite industry opposition."

Ambiguous

Having more than one possible meaning or interpretation; unclear.

Similar definitions: vague, equivocal, unclear

Example: "The contract's          language led both parties to interpret the terms differently."

Ambivalent

Having mixed or contradictory feelings about something; simultaneously holding opposing attitudes.

Similar definitions: conflicted, uncertain, of two minds

Example: "The author's tone toward the new policy is best described as         , acknowledging its merits while expressing serious reservations."

Analogous

Comparable in certain respects; similar enough to allow a comparison.

Similar definitions: comparable, parallel, similar

Example: "The court found the current case to be          to a prior ruling and applied the same legal standard."

Analogy

A comparison between two otherwise unlike things based on a resemblance of a particular aspect.

Example: "The author draws an          between the human brain and a computer to explain how memories are stored."

Anomaly

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

Similar definitions: irregularity, aberration, outlier

Example: "The sudden spike in test scores was dismissed as a statistical          rather than evidence of improved instruction."

Antecedent

The first part of a conditional statement; the 'if' clause that triggers a consequence.

Similar definitions: precondition, trigger condition

Example: "In the statement 'If it rains, the game is canceled,' rain is the         ."

Antipathy

A deep-seated feeling of dislike or aversion.

Similar definitions: hostility, aversion, animosity

Example: "The author's          toward the proposed policy is evident in her dismissive tone throughout the passage."

Appeal to authority

A logical fallacy that relies on the opinion of an authority figure outside their area of expertise as evidence for a claim.

Example: "Citing a famous actor's endorsement of a medical treatment is an          rather than a valid scientific argument."

Appeal to popularity

A logical fallacy that argues something is true or good simply because many people believe it or do it.

Similar definitions: ad populum, bandwagon fallacy

Example: "Arguing that a diet must be effective because millions of people follow it is an         ."

Arbitrary

Based on random choice or personal whim rather than any reason or system.

Similar definitions: random, capricious, unjustified

Example: "The court struck down the regulation as         , finding no rational basis for the distinction it drew."

Assertion

A confident and forceful statement of fact or belief, offered without supporting evidence.

Similar definitions: claim, declaration, contention

Example: "The editorial's central          that crime rates have risen was not backed by any statistical data."

Assume

To accept something as true without proof; to take for granted as the basis of an argument.

Similar definitions: presuppose, presume, take for granted

Example: "The argument         s that all voters are equally informed, which undermines its conclusion."

Assumption

An unstated premise that an argument depends on to be valid; something accepted as true without explicit proof.

Example: "The argument that banning plastic bags will reduce pollution rests on the          that consumers will not switch to equally harmful alternatives."

Attenuate

To reduce the force, effect, or value of something; to weaken.

Similar definitions: diminish, lessen, weaken

Example: "The new evidence served to          the prosecution's case against the defendant."

Biased sampling

A flaw in reasoning that draws broad conclusions from a sample that is not representative of the population being studied.

Similar definitions: unrepresentative sample, selection bias

Example: "Surveying only gym members about exercise habits is an example of         , since they are not representative of the general population."

Biconditional

A logical statement in which two conditions are both sufficient and necessary for each other; an 'if and only if' relationship.

Example: "'A person may vote if and only if they are a registered citizen' is a          statement, meaning both conditions must hold simultaneously."

Bolster

To support, strengthen, or reinforce an argument or position.

Similar definitions: strengthen, buttress, reinforce

Example: "The new archaeological findings          the historian's theory about early human migration."

Categorical

Unambiguously explicit and direct; absolute and without exception.

Similar definitions: absolute, unconditional, unqualified

Example: "The spokesperson issued a          denial of all allegations against the organization."

Causal reasoning flaw

A flaw that assumes a causal relationship between two events based merely on correlation or temporal sequence, without ruling out alternative explanations.

Similar definitions: post hoc fallacy, correlation-causation confusion

Example: "Concluding that a new policy caused crime to drop, ignoring other factors, is a         ."

Caustic

Sarcastic or severely critical in a biting way.

Similar definitions: scathing, acerbic, biting

Example: "The reviewer's          remarks about the novel's plot left no doubt about her disapproval."

Cautious

Careful to avoid potential problems or dangers; on the LSAT, describes an author's measured, restrained approach to a claim.

Similar definitions: guarded, circumspect, wary

Example: "The author expresses          optimism about the new treatment, noting that further studies are needed."

Circular reasoning

A logical fallacy in which the conclusion of an argument is used as one of its premises; the argument assumes what it is trying to prove.

Similar definitions: begging the question, tautology

Example: "Saying 'This law is just because it is the law' is an example of         ."

Circumvent

To find a way around an obstacle or restriction; to avoid by going around.

Similar definitions: bypass, evade, sidestep

Example: "The company restructured its operations to          the new trade regulations."

Claim

A statement or assertion put forward as true, typically one that may be disputed or is in need of support.

Similar definitions: assertion, contention, argument

Example: "The author's central          is that renewable energy can fully replace fossil fuels within two decades."

Cogent

Clear, logical, and convincing; presenting a well-reasoned argument.

Similar definitions: compelling, persuasive, convincing

Example: "The dissenting justice wrote a          opinion that challenged every premise of the majority's reasoning."

Coherent

Logically consistent and well-organized; forming a unified whole.

Similar definitions: logical, consistent, cogent

Example: "The defense attorney failed to present a          narrative that could account for all the evidence."

Compel

To force or oblige someone to do something; to make an argument so strong it demands acceptance.

Similar definitions: force, oblige, necessitate

Example: "The overwhelming evidence should          the jury to reach a guilty verdict."

Compelling

Evoking strong interest or attention; powerfully convincing.

Similar definitions: persuasive, convincing, forceful

Example: "The prosecution presented a          case that left little room for reasonable doubt."

Concede

To acknowledge or admit that something is true, often reluctantly, while still maintaining an opposing position.

Similar definitions: admit, acknowledge, grant

Example: "The author         s that the policy has some benefits but argues they are outweighed by its costs."

Conclude

To arrive at a judgment or decision by reasoning from evidence or premises.

Similar definitions: determine, deduce, infer

Example: "Based on the survey results, the researchers         d that public support for the initiative had declined."

Conclusion

The main point or claim that an argument is trying to establish, supported by premises and evidence.

Example: "The          of the argument is that mandatory recycling programs reduce landfill waste more effectively than voluntary ones."

Concur

To agree with a decision, opinion, or finding.

Similar definitions: agree, accord, coincide

Example: "Two of the three judges         red with the majority opinion, though for slightly different reasons."

Conditional statement

An if-then statement that establishes a logical relationship between a sufficient condition and a necessary condition.

Example: "'If a student passes the bar exam, then they may practice law' is a          where passing the bar is the sufficient condition."

Confounding variable

An uncontrolled factor that may influence the results of an experiment, making it difficult to determine the true cause of an observed effect.

Similar definitions: lurking variable, third factor

Example: "Income level is a potential          in the study linking education to health outcomes."

Conjecture

An opinion or conclusion formed on the basis of incomplete information; a guess.

Similar definitions: speculation, hypothesis, supposition

Example: "The author acknowledges that her explanation is largely         , as definitive evidence has yet to be found."

Consensus

A general agreement among a group; the collective opinion of a majority.

Similar definitions: agreement, accord, unanimity

Example: "There is a growing          among researchers that the phenomenon is caused by a combination of environmental factors."

Consequent

The second part of a conditional statement; the result or outcome that follows from the antecedent.

Example: "In the statement 'If you study, you will pass,' passing is the         ."

Constraint

A limitation or restriction that defines the boundaries of what is possible or permissible.

Similar definitions: restriction, limitation, condition

Example: "Budget         s forced the researchers to limit the scope of their study significantly."

Contend

To assert or maintain a position, especially in the face of opposition.

Similar definitions: argue, assert, maintain

Example: "The researchers          that the decline in bee populations is primarily due to pesticide use."

Contention

A strongly held point of view or assertion, especially one that is disputed.

Similar definitions: argument, assertion, claim

Example: "The critic's main          is that the new policy will disproportionately harm small businesses."

Contentious

Causing or likely to cause disagreement or controversy; involving heated argument.

Similar definitions: controversial, disputed, divisive

Example: "The          debate over the zoning law revealed deep divisions within the community."

Contingency

A future event or circumstance that is possible but cannot be predicted with certainty.

Similar definitions: possibility, eventuality, uncertainty

Example: "The plan accounts for every foreseeable         , including supply chain disruptions and labor shortages."

Contrapositive

A logically equivalent form of a conditional statement created by negating and reversing both the antecedent and consequent.

Example: "The          of 'If it rains, the ground is wet' is 'If the ground is not wet, it did not rain.'"

Converse

In logic, the statement formed by reversing the antecedent and consequent of a conditional; the converse is not logically equivalent to the original.

Example: "The          of 'If it rains, the ground is wet' is 'If the ground is wet, it rained,' which is not necessarily true."

Convoluted

Extremely complex and difficult to follow; intricately twisted or tangled.

Similar definitions: complicated, intricate, labyrinthine

Example: "The author's          reasoning makes it difficult to identify the central point of the argument."

Correlation

A mutual relationship or connection between two variables, which does not necessarily imply that one causes the other.

Example: "There is a strong          between ice cream sales and drowning incidents, but one does not cause the other."

Corroborate

To confirm or give support to a statement, theory, or finding with additional evidence.

Similar definitions: confirm, verify, substantiate

Example: "The second witness's testimony served to          the account given by the first."

Counterexample

A specific case or instance that disproves or contradicts a general claim or rule.

Example: "The existence of a highly successful entrepreneur who never attended college serves as a          to the claim that a degree is necessary for business success."

Criterion

A standard or principle by which something is judged or decided (plural: criteria).

Similar definitions: standard, benchmark, measure

Example: "The primary          for evaluating the proposal is whether it will reduce costs without compromising quality."

Culpable

Deserving blame or censure for being wrong, harmful, or negligent.

Similar definitions: blameworthy, guilty, liable

Example: "The investigation found the manufacturer          for failing to disclose known safety defects."

Decry

To publicly denounce or criticize something as bad or wrong.

Similar definitions: condemn, denounce, criticize

Example: "Environmental groups          the decision to open protected lands to commercial development."

Deduce

To draw a logical conclusion by reasoning from known facts or general principles.

Similar definitions: conclude, infer, derive

Example: "From the witness's testimony and the physical evidence, the detective was able to          the sequence of events."

Deference

Humble submission and respect; yielding to the judgment or authority of another.

Similar definitions: respect, regard, submission

Example: "The lower court showed          to the Supreme Court's previous ruling on the matter."

Delineate

To describe or portray something precisely; to outline or indicate with detail.

Similar definitions: outline, describe, define

Example: "The passage         s the key differences between the two competing theories of language acquisition."

Denounce

To publicly declare to be wrong or evil; to condemn openly.

Similar definitions: condemn, censure, criticize

Example: "The author         s the practice of using public funds for private development projects."

Deprecate

To express disapproval of; to belittle or disparage.

Similar definitions: disparage, criticize, belittle

Example: "The author         s the trend of replacing experienced workers with automation as shortsighted."

Derive

To obtain or reach a conclusion by reasoning; to trace the origin of something.

Similar definitions: deduce, extract, obtain

Example: "The principle of equal protection was         d from the Fourteenth Amendment."

Detached

Not influenced by personal feelings or involvement; emotionally removed from a subject.

Similar definitions: objective, dispassionate, aloof

Example: "The author maintains a          perspective, presenting both sides of the debate without revealing a preference."

Diatribe

A forceful and bitter verbal attack against someone or something.

Similar definitions: tirade, harangue, denunciation

Example: "The senator's speech quickly devolved into a          against the opposing party's platform."

Dichotomy

A division or contrast between two things that are represented as entirely different or opposed.

Similar definitions: division, split, contrast

Example: "The passage challenges the traditional          between nature and nurture, arguing that the two are deeply intertwined."

Didactic

Intended to teach or instruct, sometimes in an overly moralistic way.

Similar definitions: instructive, educational, preachy

Example: "The passage's          tone suggests the author is more interested in educating the reader than entertaining them."

Discrepancy

A difference or lack of agreement between two or more facts, statements, or claims.

Similar definitions: inconsistency, contradiction, disparity

Example: "The          between the witness's testimony and the surveillance footage raised serious doubts."

Dismissive

Showing that something is unworthy of consideration; indicating rejection or disregard.

Similar definitions: contemptuous, disdainful, scornful

Example: "The author adopts a          tone toward critics who question the study's methodology."

Disparaging

Expressing the opinion that something is of little worth; belittling.

Similar definitions: derogatory, demeaning, scornful

Example: "The reviewer's          comments about the study's sample size undermined the researchers' credibility."

Dispassionate

Not influenced by strong emotion or personal bias; rational and impartial.

Similar definitions: objective, impartial, detached

Example: "The judge maintained a          demeanor throughout the emotionally charged trial."

Dissent

To hold or express an opinion that differs from the prevailing or official position.

Similar definitions: disagree, object, oppose

Example: "The lone justice wrote a vigorous         , arguing that the majority had misinterpreted the statute."

Dogmatic

Inclined to assert principles as undeniably true, without consideration of evidence or others' opinions.

Similar definitions: rigid, doctrinaire, inflexible

Example: "The author criticizes the institution's          adherence to outdated practices that no longer serve the public interest."

Dubious

Hesitating or doubting; not to be relied upon or of questionable value.

Similar definitions: doubtful, questionable, suspect

Example: "The author regards the study's methodology as         , given the small sample size and lack of a control group."

Eclectic

Deriving ideas, style, or methods from a broad and diverse range of sources.

Similar definitions: diverse, wide-ranging, varied

Example: "The researcher's          approach drew from psychology, economics, and anthropology to form a unified theory."

Efficacy

The ability to produce a desired or intended result.

Similar definitions: effectiveness, potency, capability

Example: "The study questioned the          of the new drug in treating patients with advanced symptoms."

Elicit

To draw out a response, answer, or reaction from someone.

Similar definitions: evoke, extract, provoke

Example: "The attorney's line of questioning was designed to          an admission from the witness."

Elucidate

To make something clear; to explain or shed light on a topic.

Similar definitions: clarify, explain, illuminate

Example: "The second paragraph serves to          the complex legal principle introduced at the beginning of the passage."

Empirical

Based on observation or experience rather than theory or pure logic.

Similar definitions: observational, experiential, evidence-based

Example: "The researcher insisted on gathering          data before drawing any conclusions about the treatment's effectiveness."

Endorse

To declare one's public approval or support of something.

Similar definitions: support, approve, back

Example: "The passage suggests that the author would          any policy that prioritizes long-term environmental sustainability."

Engender

To cause or give rise to a feeling, situation, or condition.

Similar definitions: produce, generate, create

Example: "The new policy was designed to          greater trust between law enforcement and the community."

Entail

To involve something as a necessary or inevitable part or consequence.

Similar definitions: require, necessitate, involve

Example: "Accepting the conclusion of this argument would          rejecting several well-established scientific findings."

Enumerate

To mention or list items one by one; to specify individually.

Similar definitions: list, catalog, itemize

Example: "The author         s several reasons why the traditional approach is no longer viable."

Ephemeral

Lasting for a very short time; transitory.

Similar definitions: fleeting, short-lived, transient

Example: "The author argues that the economic benefits of the new policy are likely to be         , fading within a few years."

Equivocal

Open to more than one interpretation; deliberately ambiguous or misleading.

Similar definitions: ambiguous, vague, noncommittal

Example: "The witness gave an          response that left both attorneys uncertain about what had actually occurred."

Equivocation

A logical fallacy that uses a word or phrase in two different senses within the same argument, creating a misleading impression.

Example: "The argument commits the fallacy of          by using the word 'free' to mean both 'without cost' and 'without restriction.'"

Erroneous

Wrong; based on incorrect information or faulty reasoning.

Similar definitions: incorrect, mistaken, flawed

Example: "The study's conclusions were based on          assumptions about the rate of population growth."

Erudite

Having or showing great knowledge gained from extensive reading or study.

Similar definitions: scholarly, learned, knowledgeable

Example: "The professor's          commentary on constitutional law drew from centuries of legal precedent."

Eschew

To deliberately avoid or keep away from something.

Similar definitions: avoid, shun, abstain from

Example: "The author         s technical jargon in favor of plain language accessible to a general audience."

Esoteric

Understood by or intended for only a small number of people with specialized knowledge.

Similar definitions: arcane, obscure, abstruse

Example: "The passage acknowledges that the subject matter is          but attempts to make it accessible to non-specialists."

Evenhanded

Fair and impartial in treatment or judgment; not favoring one side over another.

Similar definitions: balanced, fair, equitable

Example: "The author provides an          analysis of the controversy, giving equal weight to arguments on both sides."

Exacerbate

To make a problem, bad situation, or negative feeling worse.

Similar definitions: worsen, aggravate, intensify

Example: "The author argues that the proposed remedy would actually          the very problem it was intended to solve."

Exculpate

To clear from alleged fault or guilt; to prove innocent.

Similar definitions: exonerate, absolve, vindicate

Example: "New DNA evidence served to          the defendant after fifteen years of wrongful imprisonment."

Extant

Still in existence; not destroyed, lost, or extinct.

Similar definitions: surviving, existing, remaining

Example: "The few          manuscripts from that era provide limited insight into the civilization's legal system."

Extraneous

Irrelevant or unrelated to the subject being dealt with; coming from outside.

Similar definitions: irrelevant, immaterial, superfluous

Example: "The judge instructed the jury to disregard the          information that had been introduced during cross-examination."

Extrapolate

To extend the application of known data or experience to an unknown situation by assuming existing trends will continue.

Similar definitions: project, extend, generalize

Example: "It is risky to          from a single year's data that the trend will continue indefinitely."

Facetious

Treating serious issues with deliberately inappropriate humor; not meant to be taken seriously.

Similar definitions: flippant, tongue-in-cheek, playful

Example: "The author's          remark about the committee's efficiency masks a deeper criticism of bureaucratic delays."

Fallacious

Based on a mistaken belief or unsound reasoning; containing a logical fallacy.

Similar definitions: flawed, erroneous, misleading

Example: "The argument is          because it treats correlation as proof of causation."

Fallacy

An error in reasoning that renders an argument logically invalid or unsound.

Similar definitions: flaw, error in reasoning, logical mistake

Example: "The argument contains a          because it assumes that what is true of the group must be true of each individual member."

False dichotomy

A logical fallacy that presents only two options as if they are the only possibilities, when in fact other alternatives exist.

Similar definitions: false dilemma, either-or fallacy, black-and-white thinking

Example: "The politician's claim that citizens must choose between economic growth or environmental protection is a         ."

Flaw

A weakness or defect in an argument's reasoning that undermines its logical validity.

Similar definitions: weakness, defect, error

Example: "The central          in the argument is its failure to consider alternative explanations for the observed trend."

Generalization

A broad statement or principle derived from specific cases; on the LSAT, overly broad generalizations from limited evidence are a common flaw.

Example: "Drawing a sweeping          from a single case study is a common flaw in logical reasoning."

Germane

Relevant and appropriate to the subject at hand.

Similar definitions: pertinent, relevant, applicable

Example: "The court ruled that the witness's prior convictions were not          to the case and should be excluded from testimony."