Method of argument
61 flashcards covering Method of argument for the LSAT Logical Reasoning section.
The method of argument is essentially about understanding how an argument is structured and how it functions. At its core, it involves identifying the key components—like premises, conclusions, and the logical connections between them—as well as the techniques used to build a case. For example, an argument might rely on analogy, cause-and-effect, or generalization to persuade. Grasping this helps you evaluate the validity of reasoning, which is crucial for critical thinking in law and beyond.
On the LSAT, method of argument questions appear in the Logical Reasoning section, often asking you to describe the role of a statement or explain how an argument proceeds. Common traps include confusing the argument's structure with its content or falling for subtle flaws, like unwarranted assumptions. Focus on practicing how to dissect arguments quickly, paying attention to transitional words and logical flow to avoid these pitfalls.
A concrete tip: Diagram the argument's parts on scratch paper to clarify relationships.
Terms (61)
- 01
Premise
A premise is a statement or fact provided in an argument that serves as evidence or support for the conclusion.
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Conclusion
The conclusion is the main claim or point that the argument is trying to establish, often indicated by words like 'therefore' or 'thus'.
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Assumption
An assumption is an unstated belief or idea that the argument relies on to connect the premises to the conclusion, and identifying it is key to evaluating arguments.
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Necessary Assumption
A necessary assumption is a statement that must be true for the argument to hold; without it, the conclusion does not logically follow from the premises.
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Sufficient Assumption
A sufficient assumption is a statement that, if true, would fully bridge the gap between the premises and the conclusion, making the argument valid.
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Flaw in Reasoning
A flaw in reasoning is a logical error in an argument that weakens its validity, such as overlooking counterevidence or making an unjustified leap.
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Circular Reasoning
Circular reasoning occurs when the conclusion is restated in the premises, essentially assuming what it tries to prove without providing real support.
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Ad Hominem
Ad hominem is a fallacy that attacks the person making the argument rather than addressing the argument's content, distracting from the actual issue.
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Straw Man
A straw man fallacy involves misrepresenting an opponent's argument to make it easier to attack, rather than engaging with the original position.
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Hasty Generalization
Hasty generalization is drawing a broad conclusion based on insufficient or unrepresentative evidence, leading to an overgeneralized claim.
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Appeal to Authority
An appeal to authority fallacy relies on the opinion of an expert or authority figure without sufficient evidence, especially if the authority is not relevant.
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False Cause
False cause is assuming that because one event follows another, the first caused the second, without establishing a genuine causal link.
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Slippery Slope
A slippery slope argument claims that a minor action will lead to a series of extreme consequences without evidence to support the chain of events.
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Equivocation
Equivocation is using a word or phrase in different ways within the same argument, creating confusion and undermining the logic.
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Begging the Question
Begging the question is assuming the truth of the conclusion in the premises, making the argument circular and unpersuasive.
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Conditional Reasoning
Conditional reasoning involves statements in the form of 'if A, then B,' where A is the sufficient condition and B is the necessary condition for the implication.
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If-Then Statement
An if-then statement expresses a conditional relationship, where the 'if' part must be true for the 'then' part to follow logically.
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Contrapositive
The contrapositive of a conditional statement 'if A, then B' is 'if not B, then not A,' which is logically equivalent and preserves the truth.
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Necessary vs. Sufficient Conditions
A sufficient condition guarantees the outcome, while a necessary condition must be met for the outcome but does not guarantee it.
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Analogy in Arguments
An analogy compares two similar situations to support a conclusion, but it is only strong if the similarities are relevant and the differences are not significant.
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Counterexample
A counterexample is an instance that disproves a general claim by showing a case where the argument does not hold, weakening the conclusion.
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Strengthen an Argument
To strengthen an argument means providing evidence or assumptions that make the connection between premises and conclusion more solid and less vulnerable.
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Weaken an Argument
To weaken an argument involves introducing evidence or pointing out flaws that undermine the link between premises and conclusion.
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Parallel Reasoning
Parallel reasoning identifies arguments with similar structures to the one in question, helping to evaluate validity by comparison.
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Role of a Statement
The role of a statement in an argument is its function, such as providing evidence, countering an objection, or serving as the main point.
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Main Point
The main point is the central thesis of the argument, which all other elements support and to which the argument is directed.
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Inference
An inference is a conclusion drawn from the evidence or premises, requiring logical steps without adding new information.
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Paradox
A paradox is a situation that seems contradictory but may reveal a deeper truth, and arguments about it often require resolving the apparent conflict.
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Resolve or Explain
To resolve or explain an apparent discrepancy in an argument means providing a reconciling fact or assumption that makes the situation logical.
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Method of Argument Questions
Method of argument questions ask how the author structures or supports their reasoning, focusing on techniques like analogy or evidence use.
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Confusing Correlation with Causation
Confusing correlation with causation is a common trap where two events occurring together are assumed to have a cause-effect relationship without proof.
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Identifying the Conclusion First
A strategy for method of argument is to identify the conclusion first, as it helps in understanding how the premises support or fail to support it.
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Premise Plus Assumption Equals Conclusion
In many arguments, the formula is that premises combined with an assumption lead to the conclusion, and spotting the assumption is crucial.
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Scope Shift
A scope shift occurs when an argument moves from discussing a specific case to a general one without justification, weakening the logic.
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Red Herring
A red herring is introducing an irrelevant topic to distract from the main issue, derailing the argument's focus.
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Post Hoc Fallacy
The post hoc fallacy assumes that because event A preceded event B, A caused B, ignoring other possible factors.
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Bandwagon Fallacy
The bandwagon fallacy claims something is true because many people believe it, without providing actual evidence for its validity.
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False Analogy
A false analogy is an comparison between two things that are not sufficiently alike, leading to an unsupported conclusion.
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Overgeneralization
Overgeneralization is extending a conclusion beyond the evidence, such as applying a single instance to all cases.
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Underspecification
Underspecification is failing to provide enough details in the premises, leaving the argument vague and open to challenges.
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Sampling Error
Sampling error occurs when an argument bases a conclusion on a sample that is not representative of the whole, skewing results.
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Biased Sample
A biased sample is one that is not randomly selected, leading arguments to draw incorrect conclusions from unrepresentative data.
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Appeal to Emotion
An appeal to emotion uses feelings rather than logic to persuade, which can weaken an argument by avoiding factual support.
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Genetic Fallacy
The genetic fallacy dismisses an argument based on its origin rather than its merits, such as rejecting an idea because of who proposed it.
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Composition Fallacy
The composition fallacy assumes that what is true of the parts must be true of the whole, which is not always the case.
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Division Fallacy
The division fallacy claims that what is true of the whole must be true of its parts, often leading to incorrect conclusions.
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Ambiguity
Ambiguity in an argument arises from unclear language, allowing multiple interpretations and potentially invalidating the reasoning.
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Vagueness
Vagueness occurs when terms in an argument are too imprecise, making it hard to evaluate the logic or truth of the claims.
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Loaded Question
A loaded question assumes something unproven in its phrasing, trapping the responder into accepting a false premise.
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Poisoning the Well
Poisoning the well discredits an argument in advance by introducing negative information about the source, biasing the audience.
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Tu Quoque
Tu quoque, or you too, deflects criticism by pointing out the opponent's hypocrisy, rather than addressing the argument itself.
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No True Scotsman
No true Scotsman is a fallacy that protects a claim by redefining terms to exclude counterexamples, making the argument unfalsifiable.
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Gambler's Fallacy
The gambler's fallacy assumes that past random events affect future ones in a pattern, which is illogical in independent probabilities.
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Texas Sharpshooter Fallacy
The Texas sharpshooter fallacy ignores differences and focuses on similarities after the fact, creating a false pattern.
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Argument from Ignorance
Argument from ignorance claims something is true because it has not been proven false, or vice versa, which is not valid reasoning.
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Affirming the Consequent
Affirming the consequent is a fallacy where, from 'if A then B' and 'B is true,' one incorrectly concludes 'A is true'.
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Denying the Antecedent
Denying the antecedent is invalidly concluding that if 'if A then B' and 'A is false,' then 'B is false'.
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Valid Argument
A valid argument is one where the conclusion logically follows from the premises, regardless of whether the premises are true.
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Invalid Argument
An invalid argument is one where the conclusion does not logically follow from the premises, even if the premises are true.
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Sound Argument
A sound argument is a valid argument with true premises, making the conclusion reliably true.
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Unsound Argument
An unsound argument is either invalid or has false premises, rendering its conclusion unreliable.