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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. Amount - quantity - sum - total - count - tally.n
Premise Indicators
Incorrect Method of Reasoning answers
Words used to introduce numerical ideas
Logical negation
2. 1. The info in the stimulus is supect. There are often reasoning errors present - and you will further weaken the argument in some way. 2. The answer choices are accepted as given - even if they include 'new' info. The task is to determine which answ
Fact test for Method of Reasoning questions
Rules for Family #3
Quantity indicators
Logical opposites
3. 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.
Primary Objective #9
LSAT Conclusion trick for Method AP questions
Rules for Family #1
What is the biggest reason students miss questions?
4. 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
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
Primary Objective #6
Weaken question signal words
LSAT Conclusion trick for Method AP questions
5. 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
One of the most commonly used stimulus structures is what? How are they recognized?
Premise definition
Primary Objective #6
Circular reasoning
6. Determine whether the stimulus contains an argument or if it is only a set of factual statements. MUST recognize whether a conclusion is present.
Primary Objective #2
Fact test for Method of Reasoning questions
Primary Objective #1
Family #3: Hurt
7. 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
Fact test for Method of Reasoning questions
How to solve Justify questions mechanistically
Common features of Resolve the Paradox
Things to remember in regards to WEAKEN questions
8. 1. Identify the conclusion - this is what you are trying to strengthen 2. Personalize the argument 3. Look for weaknesses in the argument 4. Arguments that contain analogies or use surveys rely upon the validity of those analogies and surveys. Answer
How to strengthen an argument
Solving Parallel Reasoning questions in the order stated
Errors in the use of evidence
How to solve Justify questions mechanistically
9. 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.
Internal contradiction AKA self contradiction
Numbers and percentage errors
Common features of Resolve the Paradox
Time shift errors
10. If the stimulus contains an argument - determine whether the argument is strong or weak.
Premise definition
Central assumption of causal conclusions
Primary Objective #3
Weaken question signal words
11. Occurs when the author uses an analogy that is two disimilar to the original situation to be applicable. n
False analogy
LSAT Definition of 'either/or'
Method of Reasoning
Justify the conclusion formula
12. 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
Solving Parallel Reasoning questions in the order stated
Rules for Family #2
Internal contradiction AKA self contradiction
the unless equation (conditional reasoning)
13. 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
Causal statements
LSAT Definition of 'either/or'
Mistaken cause and effect
General lack of relevant evidence for the conclusion
14. 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
Weakening conditional reasoning
Fact test for Method of Reasoning questions
Solving Parallel Reasoning questions in the order stated
Exceptional case/over generalization
15. If the stimulus contains an argument - identify the conclusion. If the stimulus contains a fact set - examine each fact.
Words used to introduce percentage ideas
What is the biggest reason students miss questions?
Primary Objective #2
Weakening conditional reasoning
16. 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
Prephrasing Method of Reasoning questions
Common weakening scenarios
Errors of composition and division
Method of Reasoning questions
17. 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
Rules for Family #1
Prephrasing Method of Reasoning questions
Family #3: Hurt
Conclusion Indicators
18. An event or circumstance whose occurrence indicates that a necessary condition must also occur.
Sufficient Condition
Common features of Resolve the Paradox
3 incorrect answer traps (weaken)
How to strengthen an argument
19. Occurs when an author makes conflicting statements. n
Assumptions and conditionality: the two types of answer choices normally produced are?
2 roles played by assumptions
Primary Objective #5
Internal contradiction AKA self contradiction
20. 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.
Family #4: Disprove
the unless equation (conditional reasoning)
Premise definition
2 speaker questions
21. 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 -
Probability indicators
False analogy
Incorrect answers in Point at Issue questions
the unless equation (conditional reasoning)
22. 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
Time shift errors
Rules for Family #3
Appeal Fallacies
Primary Objective #5
23. 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
Circular reasoning
Exceptional case/over generalization
Primary Objective #1
2 roles played by assumptions
24. Stimulus (affected or determined)--/-> answer choices (accepted) Negative sign on the arrow reflects attacking or hurting the argument (weaken).
Incorrect Method of Reasoning answers
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
Family #3: Hurt
Uncertain use of a term or concept
25. Caused by because of responsible for reason for leads to induced by promoted by determined by produced by product of played a role in was a factor in is an effect of.
Primary Objective #8
Conclusion definition
Words used to introduce cause and effect relationships. (memorize)
How to determine the strength of an argument
26. 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+.
Primary Objective #8
Mistaken Reversal
Main Point Questions
Probability indicators
27. Read closely and know precisely what the author said. DO NOT GENERALIZE!.
Exceptional case/over generalization
3 logical features of conditional reasoning
Primary Objective #4
Resolve the Paradox question stem features
28. 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
Time shift errors
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
Weakening conditional reasoning
Words used to introduce a necessary condition
29. Percent - proportion - fraction - ratio - incidence - likelihood - probability - segment - share. n
LSAT Definition of 'either/or'
Words used to introduce percentage ideas
Survey errors
Logical negation
30. 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
Typical assumption question stems
Rules for Family #3
31. If - when - whenever - every - all - any - people who - in order to.
Words used to introduce a sufficient condition
3 logical features of conditional reasoning
Family #3: Hurt
Prephrasing Method of Reasoning questions
32. 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
Counter Premise Indicators
Assumption Negation Technique
Quantity indicators
Necessary Condition
33. 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
Conclusion definition
One of the most commonly used stimulus structures is what? How are they recognized?
Assumptions and causality: typical correct answer categories
How to attack a causal conclusion
34. 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
Resolve the Paradox question stem features
Counter Premise Indicators
General lack of relevant evidence for the conclusion
Survey errors
35. 1. Watch for answers starting with the phrase 'at least one' or 'at least some'. When an assumption answer choice starts with one of these phrases it is usually right. But ALWAYS verify with A.N.T. 2. Avoid answers that claim an idea was the most imp
3 quirks of assumption question answer choices
Primary Objective #2
Incorrect answers in Point at Issue questions
Quantity indicators
36. 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.
Weakening conditional reasoning
Family #1: Prove
Uncertain use of a term or concept
Weaken question signal words
37. Premises + answer choice = conclusion When approaching answers - separate them into winners and losers - then apply the justify formula.
3 incorrect answer traps (weaken)
Rules for Family #3
Justify the conclusion formula
the unless equation (conditional reasoning)
38. Thus - therefore - hence - consequently - as a result - so - accordingly - clearly - must be that - shows that - conclude that - follows that - for this reason.
Words used to introduce a necessary condition
Logical negation
Conclusion Indicators
Family #3: Hurt
39. 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?
Premise definition
Appeal Fallacies
Errors in the use of evidence
Assumptions and conditionality: the two types of answer choices normally produced are?
40. If all 5 answer choices appear to be 'losers' - return to the stimulus and re-evaluate the argument.
Primary Objective #9
Family #4: Disprove
Common features of Resolve the Paradox
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
41. 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
Fundamental rules for strengthen - justify the conclusion and assumption questions
How to attack a causal conclusion
2 roles played by assumptions
Assumptions and causality: typical correct answer categories
42. 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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43. They can be in the premises or conclusion. If they are in the conclusion the argument is flawed. Classic mistaken cause and effect reasoning refers to occurences when a causal assertion is made in the conclusion or the conclusion presumes a causal re
Incorrect Method of Reasoning answers
3 logical features of conditional reasoning
Family #2: Help
Causal statements
44. 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.
Words used to introduce a sufficient condition
What is the biggest reason students miss questions?
Family #3: Hurt
Primary Objective #7
45. 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
Errors of conditional reasoning
'Additional' Premise Indicators
One of the most commonly used stimulus structures is what? How are they recognized?
3 logical features of conditional reasoning
46. 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
Survey errors
Fundamental rules for strengthen - justify the conclusion and assumption questions
False analogy
2 speaker questions
47. 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.
Quantity indicators
What is the biggest reason students miss questions?
Premise Indicators
Source argument AKA ad hominen
48. The makers of the LSAT do not think that there are multiple causes for the same effect. When an LSAT speaker concludes that one occurance caused another - that speaker also assumes that the stated cause is the only possible cause of the effect and th
Rules for Family #3
Time shift errors
Central assumption of causal conclusions
How to solve Justify questions mechanistically
49. Separate the answer choices into 'contenders' and 'loser'. After completing this process - review the contenders and decide which answer correct.
Primary Objective #8
Assumptions and causality: typical correct answer categories
Conclusion definition
Uncertain use of a term or concept
50. Involves judgements made about groups and parts of a group. an error or composition occurs when the author attributes a characteristic of part of the group to the group as a whole or to each member of the group Error of division - author attributes c
Words used to introduce a sufficient condition
Errors of composition and division
Sufficient Condition
Numbers and percentages Common misconceptions