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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 all 5 answer choices appear to be 'losers' - return to the stimulus and re-evaluate the argument.
Primary Objective #2
Weaken question signal words
Primary Objective #9
Words used to introduce cause and effect relationships. (memorize)
2. 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.
What is the biggest reason students miss questions?
Time shift errors
3 logical features of conditional reasoning
One of the most commonly used stimulus structures is what? How are they recognized?
3. 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?
2 roles played by assumptions
Conclusion definition
How to solve Justify questions mechanistically
Fact test for Method of Reasoning questions
4. Carefully read and identify the question stem. DO NOT assume that certain words are automatically associated with certain questions types.
Mistaken Reversal
'Additional' Premise Indicators
Justify the conclusion formula
Primary Objective #5
5. Amount - quantity - sum - total - count - tally.n
Words used to introduce numerical ideas
Primary Objective #2
Logical opposites
Family #1: Prove
6. 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+.
Things to remember in regards to WEAKEN questions
Rules for Family #2
Mistaken Reversal
Sufficient Condition
7. Stimulus (accepted) --/-> answer choices (affected or determined) cannot be true.
Conclusion Identification Method
General lack of relevant evidence for the conclusion
Family #4: Disprove
Method of Reasoning questions
8. 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
Central assumption of causal conclusions
Time shift errors
Main Point Questions
Errors of composition and division
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?
Words used to introduce a necessary condition
Assumption Negation Technique
Premise definition
Counter Premise Indicators
10. 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.
Family #2: Help
Errors in the use of evidence
Logical opposites
Probability indicators
11. 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
Probability indicators
Errors in the use of evidence
Family #4: Disprove
Primary Objective #6
12. 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.
Solving Parallel Reasoning questions in the order stated
Primary Objective #7
Family #2: Help
Main Point Questions
13. If the stimulus contains an argument - determine whether the argument is strong or weak.
Solving Parallel Reasoning questions in the order stated
Conclusion Indicators
Words used to introduce numerical ideas
Primary Objective #3
14. This type of flawed argument attacks the person (or source) instead of the argument they advance. because the LSAT is concerned solely with argument forms - a speaker can never validly attack the character or motives or a person; instead - a speaker
Source argument AKA ad hominen
Central assumption of causal conclusions
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
Conclusion Identification Method
15. 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
Numbers and percentage errors
General lack of relevant evidence for the conclusion
How to strengthen an argument
Probability indicators
16. 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
How to approach causality and strengthen questions?
Errors of conditional reasoning
3 logical features of conditional reasoning
Time shift errors
17. 1. You must accept the stimulus info- even if it contains an error in reasoning-and use it to prove one of the answer choices must be true. 2. Any info in an answer choice that does not appear either directly in the stimulus or as a combination of it
Errors of conditional reasoning
Appeal Fallacies
Rules for Family #1
Things to remember in regards to WEAKEN questions
18. 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
3 logical features of conditional reasoning
Words used to introduce cause and effect relationships. (memorize)
Assumptions and causality: typical correct answer categories
Words used to introduce a sufficient condition
19. 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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20. 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
Primary Objective #5
Method of Reasoning
Quantity indicators
Causal statements
21. 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
Primary Objective #4
Primary Objective #9
How to attack a causal conclusion
Family #4: Disprove
22. 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 -
3 logical features of conditional reasoning
Probability indicators
Appeal Fallacies
Circular reasoning
23. Separate the answer choices into 'contenders' and 'loser'. After completing this process - review the contenders and decide which answer correct.
Primary Objective #5
Primary Objective #8
Rules for Family #3
Central assumption of causal conclusions
24. Occurs when an author improperly equates a percentage with a definate quantity or vice versa. n
Sufficient Condition
Numbers and percentage errors
Typical assumption question stems
Mistaken Reversal
25. 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
Numbers and percentages Common misconceptions
Family #2: Help
General lack of relevant evidence for the conclusion
Uncertain use of a term or concept
26. 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.
Incorrect answers in Point at Issue questions
Quantity indicators
False analogy
Primary Objective #4
27. Percent - proportion - fraction - ratio - incidence - likelihood - probability - segment - share. n
Survey errors
Words used to introduce percentage ideas
Assumptions and causality: typical correct answer categories
How to strengthen an argument
28. 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
Errors of composition and division
Central assumption of causal conclusions
Exceptional case/over generalization
Circular reasoning
29. 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
Conclusion Indicators
Primary Objective #1
How to solve Justify questions mechanistically
Errors of composition and division
30. Assumes that only 2 courses of action are available when there may be others. n
LSAT Definition of 'either/or'
False dilemma
Weakening conditional reasoning
Appeal Fallacies
31. Stimulus (affected or determined)--/-> answer choices (accepted) Negative sign on the arrow reflects attacking or hurting the argument (weaken).
3 quirks of assumption question answer choices
Sufficient Condition
Central assumption of causal conclusions
Family #3: Hurt
32. If the stimulus contains an argument - identify the conclusion. If the stimulus contains a fact set - examine each fact.
Main Point Questions
Numbers and percentages Common misconceptions
Primary Objective #2
Common weakening scenarios
33. An event or circumstance whose occurrence is required in order for a sufficient condition to occur.
Assumptions and causality: typical correct answer categories
Justify the conclusion formula
Incorrect answers in Point at Issue questions
Necessary Condition
34. 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
Weakening conditional reasoning
Appeal Fallacies
LSAT Definition of 'either/or'
Fact test for Method of Reasoning questions
35. 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.
How to solve Justify questions mechanistically
Incorrect Method of Reasoning answers
Assumptions and conditionality: the two types of answer choices normally produced are?
Family #1: Prove
36. 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
2 roles played by assumptions
Family #2: Help
How to identify Justify the Conclusion questions
Assumptions and conditionality: the two types of answer choices normally produced are?
37. 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
Primary Objective #5
General lack of relevant evidence for the conclusion
How to strengthen an argument
38. 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.
Assumptions and conditionality: the two types of answer choices normally produced are?
Necessary Condition
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
Common weakening scenarios
39. Then - only - only if - must - required - unless - except - until - without.
How to approach causality and strengthen questions?
Family #3: Hurt
Words used to introduce a necessary condition
Primary Objective #2
40. Thus - therefore - hence - consequently - as a result - so - accordingly - clearly - must be that - shows that - conclude that - follows that - for this reason.
How to identify Justify the Conclusion questions
Mistaken cause and effect
Weaken question signal words
Conclusion Indicators
41. 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
Sufficient Condition
Method of Reasoning
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
Resolve the Paradox question stem features
42. 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
Incorrect answers in Point at Issue questions
Primary Objective #6
Primary Objective #7
Solving Parallel Reasoning questions in the order stated
43. Prephrase: after reading the question stem - take a moment to mentally formulate your answer to the question stem.
Fact test for Method of Reasoning questions
Primary Objective #6
Survey errors
Mistaken cause and effect
44. 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
Words used to introduce cause and effect relationships. (memorize)
Prephrasing Method of Reasoning questions
LSAT Conclusion trick for Method AP questions
Primary Objective #8
45. 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.
Incorrect Method of Reasoning answers
Weakening conditional reasoning
Mistaken cause and effect
Common features of Resolve the Paradox
46. 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
How to strengthen an argument
3 incorrect answer traps (weaken)
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
Things to remember in regards to WEAKEN questions
47. 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
Survey errors
Weaken question signal words
How to approach causality and strengthen questions?
Conclusion Indicators
48. 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
General lack of relevant evidence for the conclusion
LSAT Conclusion trick for Method AP questions
One of the most commonly used stimulus structures is what? How are they recognized?
Primary Objective #1
49. 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
LSAT Conclusion trick for Method AP questions
Survey errors
False analogy
Fact test for Method of Reasoning questions
50. 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.
Method of Reasoning
Family #3: Hurt
Numbers and percentages Common misconceptions
Words used to introduce cause and effect relationships. (memorize)