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Test your basic knowledge |
LSAT Logical Reasoning Clues
Start Test
Study First
Subjects
:
logic-and-reasoning
,
LSAT
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 1. Any 'new' element in the conclusion will appear in the correct answer. 2. Elements that are common to the conclusion and at least one premise normally do not appear in the correct answer. 3. Elements that appear in the premises but not the conclus
Primary Objective #2
How to solve Justify questions mechanistically
False analogy
Method of Reasoning
2. An event or circumstance whose occurrence is required in order for a sufficient condition to occur.
Logical negation
Necessary Condition
Uncertain use of a term or concept
Words used to introduce numerical ideas
3. Takes a small number of intstances and treats those instances as if they support a broad - sweeping conclusion. Often appears as an incorrect answer.n
Premise Indicators
Primary Objective #4
One of the most commonly used stimulus structures is what? How are they recognized?
Exceptional case/over generalization
4. As an argument progresses - the author must use each term in a constant - coherent fashion. using a term in different ways is inherently confusing and undermines the integrity of the argument. n
Mistaken Reversal
Circular reasoning
Uncertain use of a term or concept
How to strengthen an argument
5. 1. If conditional statements are linked together in the argument - the correct answer choice for an assumption question will typically supply a missing link in the chain or the contrapositive to that link. 2. If you see a conditional conclusion and t
Primary Objective #7
Assumptions and conditionality: the two types of answer choices normally produced are?
False dilemma
Primary Objective #5
6. 1. Incomplete info. The author fails to consider all of the possibilities or relies upon evidence that is incomplete. This flaw can be attacked by bringing up new possibilities or info. 2. Improper comparison. The author attempts to compare two or mo
3 quirks of assumption question answer choices
False analogy
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
Common weakening scenarios
7. 1. You can use only the info in the stimulus to prove the correct answer choice 2. Any answer choice that describes an element or a situation that does not occur in the stimulus is incorrect Method of Reasoning questions use a variety of formats - bu
Method of Reasoning questions
Fact test for Method of Reasoning questions
Errors of conditional reasoning
Internal contradiction AKA self contradiction
8. Usually have one male and one female. The female uses sound reasoning and the male uses flawed reasoning or makes a mistake. This is not always true - but more often than not.n
Logical opposites
Weaken question signal words
2 speaker questions
LSAT Conclusion trick for Method AP questions
9. First Family The correct answer choice will be a rephrasing of the main conclusion of the argument. The conclusion is either in the middle or beginning of the stimulus. The correct answer choice must not only be true it also must summarize the author
Main Point Questions
Common weakening scenarios
Primary Objective #5
Family #1: Prove
10. Refer to the amount or quantity in the relationship. Examples: (do not need to memorize) all - every - most - many - several - sole - only - not all - none - few.
Survey errors
Common weakening scenarios
Quantity indicators
Appeal Fallacies
11. Quantity: All = 100 Not all = 0-99 Some = 1-100 None = 0 Time: Always - Not always - Sometimes - Never Space: Everywhere - Not everywhere - Somewhere - No where.
Assumptions and conditionality: the two types of answer choices normally produced are?
Conclusion Indicators
Logical opposites
Assumption Negation Technique
12. Used to introduce other premises that support the conclusion but are sometimes non-essential to the conclusion furthermore - moreover - besides - in addition - whats more - after all.
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13. 1. An indication that the answer choices should be accepted as true 2. Keywords that indicate your task is to resolve the problem Action: Problem: Resolve Paradox Explain Contradiction Reconcile Discrepancy Conflict Puzzle *Attempt to prephrase Corre
Premise Indicators
Solving Parallel Reasoning questions in the order stated
Resolve the Paradox question stem features
Causal statements
14. Assumes that only 2 courses of action are available when there may be others. n
Weaken question signal words
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
False dilemma
Family #2: Help
15. Argument Part - If you do see the main conclusion at the end of a Method-AP problem - be prepared to answer a question about a part of the arguement other than the conclusion.n
Method of Reasoning
Errors of composition and division
How to identify Justify the Conclusion questions
False analogy
16. Always ask: Do the given facts support the conclusion? Do the premises strongly suggest that the conclusion would be true? Does the conclusion feel like an inevitable result of the premises? Or Does the conclusion go beyond the scope of the info in t
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
One of the most commonly used stimulus structures is what? How are they recognized?
How to determine the strength of an argument
Assumptions and conditionality: the two types of answer choices normally produced are?
17. Refer to the likelihood of occurence or the obligation present - as in 'The mayor should resign.' 'the law will never pass.' Examples: (do not need to memorize) must - will - always - not always - probably - likely - would - never - rarely - could -
Conclusion Identification Method
Probability indicators
Typical assumption question stems
'Additional' Premise Indicators
18. 1. The stem uses the word assumption - presupposition or some variation 2. The stem NEVER uses the word 'if' or any other sufficient condition indicator. The stem will likely contain a necessary condition indicator such as required or unless. The cor
Justify the conclusion formula
Typical assumption question stems
How to solve Justify questions mechanistically
Primary Objective #2
19. 1. Whatever term is modified by 'unless' - 'except' - 'until' or 'without' becomes the necessary condition 2. The remaining term is negated and becomes the sufficient condition.
the unless equation (conditional reasoning)
General lack of relevant evidence for the conclusion
Central assumption of causal conclusions
Primary Objective #4
20. 1. ethical versus factual situations - when the stimulus addresses something ethical - a factual answer would be incorrect and vice versa 2. dual agreement or dual disagreement - often incorrect answer choices will supply statements that both speaker
Method of Reasoning questions
Incorrect answers in Point at Issue questions
Probability indicators
Time shift errors
21. 1. assuming a causal relationship on the basis of the sequence of events 2. assuming a causal relationship when only a correlation exists 3. failure to consider an alternate cause for the effect or an alternate cause for both the cause and the effect
Rules for Family #2
Primary Objective #2
Primary Objective #6
Mistaken cause and effect
22. 1. The info in the stimulus is suspect. There are often reasoning errors present and depending on the question - you will help shore up the argument in some way. 2. The answer choices are accepted as given - even if they include 'new' info. Your task
Central assumption of causal conclusions
Resolve the Paradox question stem features
Rules for Family #2
Common weakening scenarios
23. Carefully read and identify the question stem. DO NOT assume that certain words are automatically associated with certain questions types.
Sufficient Condition
Primary Objective #5
Mistaken Negation
Causal statements
24. 1. The sufficient condition does not make the necessary condition occur. That is - the sufficient condition does not actively cause the necessary condition to happen. 2. Temporally speaking - either condition can occur first - or the two conditions c
Time shift errors
Family #2: Help
3 logical features of conditional reasoning
Counter Premise Indicators
25. If the stimulus contains an argument - identify the conclusion. If the stimulus contains a fact set - examine each fact.
Primary Objective #2
How to solve Justify questions mechanistically
Rules for Family #2
False analogy
26. Always read each of the five answer choices. If an answer choice appears somewhat attractive - interesting or even confusing - keep it as a contender and move to the next answer.
Premise Indicators
Conclusion Identification Method
Family #4: Disprove
Primary Objective #7
27. Occurs when an author attempts to attack an opponent's position by ignoring the actual statements made by the opposing speaker and instead distorts and refashions the argument - making it weaker in the process. Often prephrased by 'what you're saying
Things to remember in regards to WEAKEN questions
Straw Man
Assumptions and causality: typical correct answer categories
Rules for Family #3
28. 1. The stimulus will almost always contain an argument you must identify - isolate and assess the premises and the conclusion of the argument 2. Focus on the conclusion. Almost all correct answer choices impact the conclusion 3. The info in the stimu
Fact test for Method of Reasoning questions
Fundamental rules for strengthen - justify the conclusion and assumption questions
Words used to introduce cause and effect relationships. (memorize)
Common weakening scenarios
29. Authors misuses info to such a degree that they fail to provide any info to support their conclusion or they provide info that is irrelevant to their conclusion. n
Straw Man
General lack of relevant evidence for the conclusion
2 roles played by assumptions
Counter Premise Indicators
30. Whenever you identify a causal relationship in the conclusion of an LSAT problem - immediately prepare to either weaken or strengthen the argument. Tasks for Weaken questions...must always identify a causal conclusion. Then ask if there relationship
Numbers and percentage errors
Common features of Resolve the Paradox
Conclusion definition
How to attack a causal conclusion
31. Switches the elements in the sufficient and necessary conditions - creating a statement that does not have to be true. Given: A+ --> Study Mistaken Reversal: Study --> A+.
3 quirks of assumption question answer choices
Causal statements
Typical assumption question stems
Mistaken Reversal
32. They h ave failed to fully and accurately identify the conclusion of the argument. If a conclusion is present - you MUST identify it prior to proceeding on to the question stem.
Appeal Fallacies
What is the biggest reason students miss questions?
Words used to introduce percentage ideas
How to approach causality and strengthen questions?
33. 1. The survey uses a biased sample 2. The survey questions are improperly constructed 3. Respondents to the survey give inaccurate responses. People do not always tell the truth when responding to surveys.n
What is the biggest reason students miss questions?
Survey errors
How to attack a causal conclusion
Mistaken Reversal
34. 1. Appeal to authority - uses the opinion of an authority in an attempt to persuade the reader. The flaw is that the authority may not have relevant knowledge or all of the info regarding the situation - to there may be a difference of opinion among
Appeal Fallacies
LSAT Conclusion trick for Method AP questions
Common weakening scenarios
Words used to introduce a necessary condition
35. Mistaken negation and reversal exp: taking the non-existence of something as evidence that a necessary precondition for that thing also did not exist' (MN) 'mistakes being sufficient to justify punishment for being required to justify it' (MR)n
Errors of composition and division
Mistaken Reversal
Family #4: Disprove
Errors of conditional reasoning
36. Thus - therefore - hence - consequently - as a result - so - accordingly - clearly - must be that - shows that - conclude that - follows that - for this reason.
Sufficient Condition
Conclusion Indicators
Primary Objective #9
Primary Objective #2
37. A statement or judgement that follows from one or more reasons. Ask: What is the author driving at? What does the author want me to believe? What point follows from the others?
Rules for Family #3
Conclusion definition
Method of Reasoning questions
Primary Objective #3
38. Mis-assessing the force of evidence is a frequent error committed by LSAT authors 1. Lack of evidence for a position is taken to prove that position is false 2. lack of evidence against a position is taken to prove that position is true 3. some evide
Common weakening scenarios
Prephrasing Method of Reasoning questions
Quantity indicators
Errors in the use of evidence
39. Occurs when an author improperly equates a percentage with a definate quantity or vice versa. n
2 speaker questions
Numbers and percentage errors
Premise definition
Family #3: Hurt
40. A. Eliminate any alternate causes for the stated effect. B. Show that when the cause occurs - the effect occurs. C. Show that when the cause does not occur - the effect does not occur. D. Eliminate the possility that the stated relationship is revers
Straw Man
Main Point Questions
Primary Objective #4
How to approach causality and strengthen questions?
41. Stimulus (affected or determined) ---> answer choices (accepted) AKA: Help Family assumption - justify the conclusion - strengthen/support - resolve the paradox.
Primary Objective #6
the unless equation (conditional reasoning)
Family #2: Help
LSAT Definition of 'either/or'
42. Amount - quantity - sum - total - count - tally.n
Logical negation
Numbers and percentages Common misconceptions
2 speaker questions
Words used to introduce numerical ideas
43. If - when - whenever - every - all - any - people who - in order to.
Weaken question signal words
False analogy
Words used to introduce a sufficient condition
Primary Objective #3
44. A fact - proposition or statement from which a conclusion is made. Ask: What reasons has the author used to persuade me? Why should I believe this argument? What evidence exists?
Assumption Negation Technique
Premise definition
Incorrect answers in Point at Issue questions
How to solve Justify questions mechanistically
45. Then - only - only if - must - required - unless - except - until - without.
3 incorrect answer traps (weaken)
Primary Objective #1
Words used to introduce a necessary condition
Family #1: Prove
46. Stimulus (accepted) ----> Answer Choices (affected or determined) AKA: must be or prove family must be true - main point - point at issue - method of reasoning - flaw in the reasoning - parallel reasoning.
One of the most commonly used stimulus structures is what? How are they recognized?
Family #1: Prove
Uncertain use of a term or concept
What is the biggest reason students miss questions?
47. An event or circumstance whose occurrence indicates that a necessary condition must also occur.
Incorrect answers in Point at Issue questions
Mistaken Reversal
Sufficient Condition
Quantity indicators
48. Read closely and know precisely what the author said. DO NOT GENERALIZE!.
Primary Objective #4
Assumptions and causality: typical correct answer categories
Primary Objective #2
False dilemma
49. 1. The stem uses the word strengthen or a synonym (support - helps - most justifies) 2. The stem indicates that you should accept the answer choices are true.
Causal statements
Method of Reasoning
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
Family #1: Prove
50. Think about the structure of the argument before examining the answer choices. Do not expect to see the exact prephrase - there are too many variations. Make an abstract prephrase then examine each answer to see if it paraphrases the prephrase.n
Family #4: Disprove
Necessary Condition
Circular reasoning
Prephrasing Method of Reasoning questions