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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. Take the statements under consideration and place them in an arrangement that forces once to be the conclusion and the other(s) to be the premise (s). Use premise and conclusion indicators to achieve this end. Once the pieces are arranged - determine
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
Conclusion Identification Method
Method of Reasoning questions
Rules for Family #1
2. Percent - proportion - fraction - ratio - incidence - likelihood - probability - segment - share. n
Fact test for Method of Reasoning questions
How to strengthen an argument
Words used to introduce percentage ideas
Central assumption of causal conclusions
3. 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
How to determine the strength of an argument
Quantity indicators
LSAT Conclusion trick for Method AP questions
Necessary Condition
4. 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
How to determine the strength of an argument
Fact test for Method of Reasoning questions
Circular reasoning
Method of Reasoning questions
5. 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
Primary Objective #6
Straw Man
Incorrect answers in Point at Issue questions
One of the most commonly used stimulus structures is what? How are they recognized?
6. 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
Assumptions and causality: typical correct answer categories
Exceptional case/over generalization
Primary Objective #2
Mistaken Reversal
7. 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
One of the most commonly used stimulus structures is what? How are they recognized?
Weakening conditional reasoning
3 quirks of assumption question answer choices
Rules for Family #2
8. Stimulus (affected or determined) ---> answer choices (accepted) AKA: Help Family assumption - justify the conclusion - strengthen/support - resolve the paradox.
Primary Objective #3
How to determine the strength of an argument
Primary Objective #6
Family #2: Help
9. If all 5 answer choices appear to be 'losers' - return to the stimulus and re-evaluate the argument.
False dilemma
What is the biggest reason students miss questions?
Survey errors
Primary Objective #9
10. 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
Mistaken cause and effect
Family #4: Disprove
2 speaker questions
Incorrect Method of Reasoning answers
11. The mistake involves assuming that conditions will remain constant over time - and that what was the case in the past will be the case in the future or present. n
Main Point Questions
Family #2: Help
Time shift errors
Typical assumption question stems
12. 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?
Premise definition
Conclusion definition
Conclusion Indicators
Circular reasoning
13. 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
Premise Indicators
Words used to introduce cause and effect relationships. (memorize)
Incorrect answers in Point at Issue questions
14. To logically negate a conditional statement - negate the necessary condition. Example: neither...nor becomes either...or.
Logical negation
Incorrect answers in Point at Issue questions
Exceptional case/over generalization
LSAT Conclusion trick for Method AP questions
15. 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
Mistaken Negation
Numbers and percentages Common misconceptions
Primary Objective #9
Solving Parallel Reasoning questions in the order stated
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
3 incorrect answer traps (weaken)
Primary Objective #4
How to determine the strength of an argument
Quantity indicators
17. 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
Family #4: Disprove
How to strengthen an argument
Assumption Negation Technique
Typical assumption question stems
18. Determine whether the stimulus contains an argument or if it is only a set of factual statements. MUST recognize whether a conclusion is present.
General lack of relevant evidence for the conclusion
Straw Man
Appeal Fallacies
Primary Objective #1
19. 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
Quantity indicators
False dilemma
How to determine the strength of an argument
Uncertain use of a term or concept
20. 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
Incorrect Method of Reasoning answers
3 incorrect answer traps (weaken)
Assumption Negation Technique
How to identify Justify the Conclusion questions
21. 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.
Words used to introduce numerical ideas
Assumptions and causality: typical correct answer categories
Probability indicators
Logical opposites
22. 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.
Words used to introduce percentage ideas
Premise definition
Words used to introduce cause and effect relationships. (memorize)
Counter Premise Indicators
23. 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.
Probability indicators
Common features of Resolve the Paradox
Fact test for Method of Reasoning questions
Family #2: Help
24. 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
How to approach causality and strengthen questions?
Method of Reasoning
Assumptions and causality: typical correct answer categories
Errors of composition and division
25. 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
Internal contradiction AKA self contradiction
Method of Reasoning questions
Mistaken cause and effect
Central assumption of causal conclusions
26. 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
Central assumption of causal conclusions
Primary Objective #3
Family #4: Disprove
27. Occurs when an author makes conflicting statements. n
Words used to introduce cause and effect relationships. (memorize)
Internal contradiction AKA self contradiction
LSAT Definition of 'either/or'
Premise Indicators
28. 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
Primary Objective #1
Primary Objective #8
Common features of Resolve the Paradox
Survey errors
29. 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.
Source argument AKA ad hominen
Primary Objective #7
Fundamental rules for strengthen - justify the conclusion and assumption questions
3 quirks of assumption question answer choices
30. 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
Primary Objective #4
Resolve the Paradox question stem features
Rules for Family #1
Errors in the use of evidence
31. 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
Primary Objective #5
False analogy
Main Point Questions
Uncertain use of a term or concept
32. If the stimulus contains an argument - determine whether the argument is strong or weak.
LSAT Conclusion trick for Method AP questions
Necessary Condition
Primary Objective #3
Mistaken cause and effect
33. 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
Main Point Questions
Exceptional case/over generalization
Assumption Negation Technique
34. 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
LSAT Conclusion trick for Method AP questions
Counter Premise Indicators
Things to remember in regards to WEAKEN questions
Numbers and percentages Common misconceptions
35. 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
Method of Reasoning questions
General lack of relevant evidence for the conclusion
How to identify Justify the Conclusion questions
LSAT Conclusion trick for Method AP questions
36. 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
3 quirks of assumption question answer choices
Primary Objective #6
Rules for Family #1
37. Separate the answer choices into 'contenders' and 'loser'. After completing this process - review the contenders and decide which answer correct.
Primary Objective #8
Rules for Family #2
Mistaken Reversal
False analogy
38. 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
How to solve Justify questions mechanistically
Numbers and percentage errors
Rules for Family #3
Words used to introduce numerical ideas
39. 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.
Logical negation
Rules for Family #3
Mistaken cause and effect
the unless equation (conditional reasoning)
40. 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
LSAT Definition of 'either/or'
Assumptions and causality: typical correct answer categories
Common weakening scenarios
Prephrasing Method of Reasoning questions
41. 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.
Rules for Family #3
Primary Objective #9
Premise Indicators
Incorrect answers in Point at Issue questions
42. Occurs when an author improperly equates a percentage with a definate quantity or vice versa. n
Errors of composition and division
Primary Objective #7
Primary Objective #4
Numbers and percentage errors
43. An event or circumstance whose occurrence is required in order for a sufficient condition to occur.
Necessary Condition
Primary Objective #8
Numbers and percentages Common misconceptions
LSAT Conclusion trick for Method AP questions
44. 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
What is the biggest reason students miss questions?
Solving Parallel Reasoning questions in the order stated
Causal statements
False dilemma
45. 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.
Conclusion Identification Method
Family #1: Prove
Justify the conclusion formula
Errors of conditional reasoning
46. 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
Assumptions and causality: typical correct answer categories
Weaken question signal words
Fact test for Method of Reasoning questions
Words used to introduce numerical ideas
47. If the stimulus contains an argument - identify the conclusion. If the stimulus contains a fact set - examine each fact.
Primary Objective #8
Primary Objective #2
Conclusion Identification Method
How to approach causality and strengthen questions?
48. If - when - whenever - every - all - any - people who - in order to.
What is the biggest reason students miss questions?
3 logical features of conditional reasoning
Sufficient Condition
Words used to introduce a sufficient condition
49. 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?
Causal statements
General lack of relevant evidence for the conclusion
Prephrasing Method of Reasoning questions
50. Negates both conditions - creating a statement that does not have to be true. Given: A+ --> Study Mistaken Negation: Not A+ --> Not Study
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
LSAT Definition of 'either/or'
Mistaken Negation
Conclusion Identification Method