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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. 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
Premise Indicators
Assumptions and causality: typical correct answer categories
Family #3: Hurt
Mistaken cause and effect
2. 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
Central assumption of causal conclusions
Errors of composition and division
How to identify Justify the Conclusion questions
Necessary Condition
3. 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
How to approach causality and strengthen questions?
Appeal Fallacies
Fundamental rules for strengthen - justify the conclusion and assumption questions
the unless equation (conditional reasoning)
4. 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 #1
Primary Objective #4
Common features of Resolve the Paradox
Prephrasing Method of Reasoning questions
5. If - when - whenever - every - all - any - people who - in order to.
Words used to introduce numerical ideas
Words used to introduce a sufficient condition
Weaken question signal words
Numbers and percentages Common misconceptions
6. 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?
Probability indicators
Method of Reasoning
Things to remember in regards to WEAKEN questions
Conclusion definition
7. 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
3 incorrect answer traps (weaken)
Source argument AKA ad hominen
Quantity indicators
Common weakening scenarios
8. 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
Circular reasoning
the unless equation (conditional reasoning)
Prephrasing Method of Reasoning questions
9. Carefully read and identify the question stem. DO NOT assume that certain words are automatically associated with certain questions types.
'Additional' Premise Indicators
Primary Objective #5
Primary Objective #3
LSAT Definition of 'either/or'
10. 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
Incorrect Method of Reasoning answers
One of the most commonly used stimulus structures is what? How are they recognized?
the unless equation (conditional reasoning)
Time shift errors
11. Read closely and know precisely what the author said. DO NOT GENERALIZE!.
Primary Objective #4
General lack of relevant evidence for the conclusion
2 roles played by assumptions
Common features of Resolve the Paradox
12. 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
Time shift errors
Weakening conditional reasoning
Conclusion Identification Method
Method of Reasoning questions
13. 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
False dilemma
Main Point Questions
How to attack a causal conclusion
Circular reasoning
14. Negates both conditions - creating a statement that does not have to be true. Given: A+ --> Study Mistaken Negation: Not A+ --> Not Study
Primary Objective #7
Source argument AKA ad hominen
Mistaken Negation
Errors in the use of evidence
15. Prephrase: after reading the question stem - take a moment to mentally formulate your answer to the question stem.
Primary Objective #6
Errors of conditional reasoning
Mistaken Negation
Conclusion Identification Method
16. 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
Premise definition
Numbers and percentages Common misconceptions
Assumption Negation Technique
Primary Objective #3
17. Immediately look for the repeat or contrapositive in the answer choices. Avoid mistaken reversals and mistaken negations.
Method of Reasoning questions
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
Words used to introduce a necessary condition
Errors of conditional reasoning
18. 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
How to determine the strength of an argument
Family #2: Help
How to approach causality and strengthen questions?
Fact test for Method of Reasoning questions
19. 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+.
2 roles played by assumptions
Common weakening scenarios
Mistaken Reversal
LSAT Conclusion trick for Method AP questions
20. 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.
Premise definition
Necessary Condition
Incorrect Method of Reasoning answers
Quantity indicators
21. If all 5 answer choices appear to be 'losers' - return to the stimulus and re-evaluate the argument.
Primary Objective #9
Words used to introduce a sufficient condition
Uncertain use of a term or concept
Typical assumption question stems
22. Amount - quantity - sum - total - count - tally.n
Logical opposites
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
Words used to introduce numerical ideas
Method of Reasoning
23. Occurs when an author improperly equates a percentage with a definate quantity or vice versa. n
Numbers and percentage errors
Incorrect answers in Point at Issue questions
Errors of conditional reasoning
Primary Objective #8
24. 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
Main Point Questions
3 logical features of conditional reasoning
Weakening conditional reasoning
Incorrect Method of Reasoning answers
25. 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
Words used to introduce cause and effect relationships. (memorize)
Primary Objective #1
LSAT Conclusion trick for Method AP questions
How to solve Justify questions mechanistically
26. 1. if you recognize the form of reasoning used in the stimulus (causal - conditional - etc.) immediately attack the answers and search for the answer with similar reasoning (analogy - circular reasoning) 2. The Conclusion - match the conclusions - to
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
Solving Parallel Reasoning questions in the order stated
Words used to introduce numerical ideas
'Additional' Premise Indicators
27. 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
Central assumption of causal conclusions
Mistaken Reversal
2 speaker questions
Fundamental rules for strengthen - justify the conclusion and assumption questions
28. 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
How to attack a causal conclusion
Weaken question signal words
Rules for Family #2
General lack of relevant evidence for the conclusion
29. 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
Resolve the Paradox question stem features
How to identify Justify the Conclusion questions
Typical assumption question stems
Rules for Family #3
30. 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?
Incorrect answers in Point at Issue questions
Fundamental rules for strengthen - justify the conclusion and assumption questions
Assumption Negation Technique
31. If the stimulus contains an argument - determine whether the argument is strong or weak.
Straw Man
Primary Objective #3
Quantity indicators
Incorrect Method of Reasoning answers
32. 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 of conditional reasoning
Method of Reasoning
the unless equation (conditional reasoning)
33. 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.
Primary Objective #3
Logical opposites
Words used to introduce cause and effect relationships. (memorize)
Words used to introduce a sufficient condition
34. 1. Stimulus will contain an argument. Must isolate and identify and assess the premises and the conclusion. 2. Focus on the conclusion. Almost all correct Weaken answers impact the conclusion. 3. The info in the stimulus is suspect. There are often r
LSAT Definition of 'either/or'
2 roles played by assumptions
Things to remember in regards to WEAKEN questions
Common features of Resolve the Paradox
35. 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
Primary Objective #1
Assumptions and causality: typical correct answer categories
How to determine the strength of an argument
36. 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
Rules for Family #3
Time shift errors
3 logical features of conditional reasoning
How to solve Justify questions mechanistically
37. 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
Survey errors
Causal statements
Internal contradiction AKA self contradiction
38. Premises + answer choice = conclusion When approaching answers - separate them into winners and losers - then apply the justify formula.
Necessary Condition
Justify the conclusion formula
How to determine the strength of an argument
Appeal Fallacies
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
Time shift errors
Primary Objective #5
Main Point Questions
Straw Man
40. 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
Primary Objective #3
Logical opposites
Conclusion Indicators
41. 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
2 roles played by assumptions
3 quirks of assumption question answer choices
Method of Reasoning questions
Common weakening scenarios
42. 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
3 incorrect answer traps (weaken)
2 speaker questions
Exceptional case/over generalization
Resolve the Paradox question stem features
43. 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
Logical negation
Family #2: Help
One of the most commonly used stimulus structures is what? How are they recognized?
Assumptions and causality: typical correct answer categories
44. Supporter - the traditional linking role - where an assumption connects pieces of the argument. (often new or rogue pieces) They also can close gaps. Ex: All male citizens of athens had the right to vote. Therefore - Socrates had the right to vote in
Mistaken Negation
2 roles played by assumptions
One of the most commonly used stimulus structures is what? How are they recognized?
Rules for Family #2
45. 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.
Common features of Resolve the Paradox
How to solve Justify questions mechanistically
Method of Reasoning
Premise Indicators
46. 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
Assumption Negation Technique
Errors in the use of evidence
How to solve Justify questions mechanistically
Method of Reasoning
47. 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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48. Then - only - only if - must - required - unless - except - until - without.
Words used to introduce a necessary condition
Method of Reasoning questions
Errors of conditional reasoning
LSAT Conclusion trick for Method AP questions
49. 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
3 incorrect answer traps (weaken)
Source argument AKA ad hominen
Rules for Family #2
How to identify Justify the Conclusion questions
50. Separate the answer choices into 'contenders' and 'loser'. After completing this process - review the contenders and decide which answer correct.
3 quirks of assumption question answer choices
Exceptional case/over generalization
Mistaken Negation
Primary Objective #8