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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. If an answer choice describes an event that did not occur in the stimulus - then that answer is incorrect. Watch for answers that are partially true - that is answers that contain a description of something that happened in the argument but that also
Fact test for Method of Reasoning questions
3 quirks of assumption question answer choices
2 speaker questions
Things to remember in regards to WEAKEN questions
2. 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
Rules for Family #2
Assumption Negation Technique
Probability indicators
Source argument AKA ad hominen
3. Stimulus (affected or determined) ---> answer choices (accepted) AKA: Help Family assumption - justify the conclusion - strengthen/support - resolve the paradox.
Numbers and percentage errors
Family #2: Help
Incorrect answers in Point at Issue questions
Family #3: Hurt
4. 1. Increasing percentages automatically lead to increasing numbers. This is not necessarily true because the overall size of the group could get smaller. 2. Decreasing percentages automatically lead to decreasing numbers 3. Increasing numbers automat
Rules for Family #2
Solving Parallel Reasoning questions in the order stated
Internal contradiction AKA self contradiction
Numbers and percentages Common misconceptions
5. 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
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
Prephrasing Method of Reasoning questions
How to strengthen an argument
Exceptional case/over generalization
6. 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)
Primary Objective #6
Logical negation
Conclusion Identification Method
7. 1. new element answers - an answer that describes something that did not occure or describes an element new to the argument cannot be correct 2. Half right - half wrong answers - LSAT makers like to start off with something that happened - then end w
Incorrect Method of Reasoning answers
What is the biggest reason students miss questions?
Words used to introduce a necessary condition
Family #3: Hurt
8. Premises + answer choice = conclusion When approaching answers - separate them into winners and losers - then apply the justify formula.
Weaken question signal words
Justify the conclusion formula
Fundamental rules for strengthen - justify the conclusion and assumption questions
How to attack a causal conclusion
9. 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?
Errors of composition and division
Premise definition
LSAT Definition of 'either/or'
Primary Objective #9
10. If the stimulus contains an argument - identify the conclusion. If the stimulus contains a fact set - examine each fact.
Words used to introduce a necessary condition
Solving Parallel Reasoning questions in the order stated
Primary Objective #2
Rules for Family #3
11. Amount - quantity - sum - total - count - tally.n
How to strengthen an argument
'Additional' Premise Indicators
Words used to introduce numerical ideas
Words used to introduce cause and effect relationships. (memorize)
12. Weaken - attack - undermine - refute - argue against - call into question - cast doubt - challenge - damage - counter - When evaluating answers ask yourself: 'Would this answer choice make the author reconsider his position or force the author to res
What is the biggest reason students miss questions?
False dilemma
Weaken question signal words
Primary Objective #1
13. 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.
3 incorrect answer traps (weaken)
Primary Objective #2
Fundamental rules for strengthen - justify the conclusion and assumption questions
What is the biggest reason students miss questions?
14. 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
One of the most commonly used stimulus structures is what? How are they recognized?
Mistaken cause and effect
Conclusion Identification Method
Conclusion Indicators
15. 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
General lack of relevant evidence for the conclusion
Justify the conclusion formula
2 speaker questions
Fundamental rules for strengthen - justify the conclusion and assumption questions
16. 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.
Primary Objective #7
General lack of relevant evidence for the conclusion
Numbers and percentage errors
Logical negation
17. A. Eliminates an alternate cause for the stated effect B. Shows that when the cause occurs - the effect occurs - assumption answers affirm the cause/effect relationship C. Show that when the cause does not occur - the effect doe not occur D. Eliminat
3 logical features of conditional reasoning
Solving Parallel Reasoning questions in the order stated
Rules for Family #1
Assumptions and causality: typical correct answer categories
18. 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
Method of Reasoning
Mistaken Reversal
Survey errors
Words used to introduce percentage ideas
19. At least on of the two - possibly both.
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20. 1. No conclusion. When a stimulus does not have a conclusion and contains a paradox - expect a Resolve question 2. Language of contradiction exp: but - however - yet - although - paradoxically - surprisingly.
Common features of Resolve the Paradox
Primary Objective #1
Primary Objective #2
How to determine the strength of an argument
21. 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
How to approach causality and strengthen questions?
Weaken question signal words
Words used to introduce numerical ideas
Assumptions and conditionality: the two types of answer choices normally produced are?
22. 1. Opposite answers. These answers do the exact opposite of What is needed. 2. Shell game answers. Occurs when an idea or concept is raised in the stimulus and then a very similar idea appears in the answer choices - but the idea is changed just enou
Main Point Questions
Premise Indicators
'Additional' Premise Indicators
3 incorrect answer traps (weaken)
23. 1. Stem uses the word 'if' or another sufficient indicator 2. Stem uses the phrase 'allows the conclusion to be properly drawn' or 'enables the conclusion to be properly drawn'. 3. Stem does not lessen the degree of justification. Never uses 'most ju
Circular reasoning
Common features of Resolve the Paradox
Errors of composition and division
How to identify Justify the Conclusion questions
24. 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+.
Mistaken Reversal
Fact test for Method of Reasoning questions
Words used to introduce numerical ideas
Method of Reasoning
25. To raise a viewpoint at the beginning of the stimulus and then disagree with it immediately thereafter. The stimulus often begins with: Some people claim... Some people propose... Many people believe... Some argue that... Some critics claim... Some s
Numbers and percentage errors
2 speaker questions
One of the most commonly used stimulus structures is what? How are they recognized?
How to attack a causal conclusion
26. 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
Errors in the use of evidence
General lack of relevant evidence for the conclusion
Central assumption of causal conclusions
One of the most commonly used stimulus structures is what? How are they recognized?
27. Allows you to decide between contenders or to confirm that the answer you have chosen is correct. 1. Logically negate the answer choices under consideration. Usually consists of taking a 'not' out of a sentence or putting a 'not' in a sentence. 2. Th
Numbers and percentages Common misconceptions
Premise definition
Fundamental rules for strengthen - justify the conclusion and assumption questions
Assumption Negation Technique
28. 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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29. Carefully read and identify the question stem. DO NOT assume that certain words are automatically associated with certain questions types.
One of the most commonly used stimulus structures is what? How are they recognized?
Premise Indicators
Primary Objective #5
Family #4: Disprove
30. 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
Family #3: Hurt
Errors in the use of evidence
Errors of conditional reasoning
Fundamental rules for strengthen - justify the conclusion and assumption questions
31. Introduce something that actually contains an idea that is counter to the argument. By raising opposition - the author can minimize the damage that would be done by the objection if it were raised elsewhere. but yet - however - on the other hand - ad
Primary Objective #3
Primary Objective #2
Counter Premise Indicators
Rules for Family #3
32. To weaken a conditional conclusion - attack the necessary condition by showing that the necessary condition does not need to occur in order for the sufficient condition to occur. With a combo of a conditional reasoning stimulus and a weaken question
Circular reasoning
Mistaken Negation
Assumptions and conditionality: the two types of answer choices normally produced are?
Weakening conditional reasoning
33. Negates both conditions - creating a statement that does not have to be true. Given: A+ --> Study Mistaken Negation: Not A+ --> Not Study
Family #2: Help
Words used to introduce a sufficient condition
Mistaken Negation
Prephrasing Method of Reasoning questions
34. They often feature 2 conclusions (main and sub.) - when the main conclusion is typically place in the first or second sentence and the last sentence contains the sub. conclusion. The sub. conclusion is set off by conclusion indicators while the main
LSAT Conclusion trick for Method AP questions
Primary Objective #2
Family #1: Prove
Mistaken Reversal
35. 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
How to approach causality and strengthen questions?
Family #2: Help
'Additional' Premise Indicators
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
36. Determine whether the stimulus contains an argument or if it is only a set of factual statements. MUST recognize whether a conclusion is present.
Straw Man
Primary Objective #1
Logical negation
Central assumption of causal conclusions
37. Read closely and know precisely what the author said. DO NOT GENERALIZE!.
Uncertain use of a term or concept
Primary Objective #4
3 quirks of assumption question answer choices
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
38. If the stimulus contains an argument - determine whether the argument is strong or weak.
2 speaker questions
Primary Objective #3
Assumptions and conditionality: the two types of answer choices normally produced are?
Incorrect answers in Point at Issue questions
39. 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
Straw Man
Solving Parallel Reasoning questions in the order stated
the unless equation (conditional reasoning)
Family #4: Disprove
40. Because - since - for - for example - for the reason that - in that - given that - as indicated by - due to - owing to - this can be seen from - we know this by.
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
Rules for Family #3
Causal statements
Premise Indicators
41. Stimulus (accepted) --/-> answer choices (affected or determined) cannot be true.
Common features of Resolve the Paradox
Primary Objective #8
Words used to introduce a sufficient condition
Family #4: Disprove
42. Prephrase: after reading the question stem - take a moment to mentally formulate your answer to the question stem.
Family #4: Disprove
Words used to introduce numerical ideas
Primary Objective #6
Fact test for Method of Reasoning questions
43. Percent - proportion - fraction - ratio - incidence - likelihood - probability - segment - share. n
Method of Reasoning
Words used to introduce percentage ideas
3 quirks of assumption question answer choices
Premise definition
44. 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
General lack of relevant evidence for the conclusion
Resolve the Paradox question stem features
How to determine the strength of an argument
Mistaken Reversal
45. 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
LSAT Definition of 'either/or'
Exceptional case/over generalization
General lack of relevant evidence for the conclusion
Errors of composition and division
46. Separate the answer choices into 'contenders' and 'loser'. After completing this process - review the contenders and decide which answer correct.
Words used to introduce numerical ideas
LSAT Definition of 'either/or'
Quantity indicators
Primary Objective #8
47. Occurs when an author makes conflicting statements. n
Internal contradiction AKA self contradiction
Family #2: Help
One of the most commonly used stimulus structures is what? How are they recognized?
Weaken question signal words
48. The author assumes as true What is supposed to be proved. exp: 'this essay is the best because it is better than all the others'n
Counter Premise Indicators
How to attack a causal conclusion
Circular reasoning
Words used to introduce cause and effect relationships. (memorize)
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.
Rules for Family #1
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
Assumption Negation Technique
Survey errors
50. 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.
Family #1: Prove
Mistaken Negation
Numbers and percentages Common misconceptions
3 logical features of conditional reasoning