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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. 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
Words used to introduce cause and effect relationships. (memorize)
How to solve Justify questions mechanistically
How to approach causality and strengthen questions?
Sufficient Condition
2. Stimulus (affected or determined)--/-> answer choices (accepted) Negative sign on the arrow reflects attacking or hurting the argument (weaken).
Family #3: Hurt
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
Primary Objective #8
Causal statements
3. 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
Primary Objective #5
Fundamental rules for strengthen - justify the conclusion and assumption questions
Necessary Condition
Family #4: Disprove
4. 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
Counter Premise Indicators
2 speaker questions
Time shift errors
Conclusion Identification Method
5. 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
Mistaken cause and effect
Logical opposites
What is the biggest reason students miss questions?
Mistaken Negation
6. 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
Rules for Family #1
Conclusion Identification Method
Assumptions and causality: typical correct answer categories
Survey errors
7. 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
Premise Indicators
3 quirks of assumption question answer choices
Assumptions and causality: typical correct answer categories
One of the most commonly used stimulus structures is what? How are they recognized?
8. 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
Words used to introduce a sufficient condition
Typical assumption question stems
Primary Objective #6
Common weakening scenarios
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?
'Additional' Premise Indicators
Family #1: Prove
Survey errors
Premise definition
10. 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
Family #2: Help
Fundamental rules for strengthen - justify the conclusion and assumption questions
Counter Premise Indicators
Rules for Family #3
11. If - when - whenever - every - all - any - people who - in order to.
How to attack a causal conclusion
2 speaker questions
Words used to introduce a sufficient condition
'Additional' Premise Indicators
12. 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
Rules for Family #2
Weakening conditional reasoning
Family #3: Hurt
Errors in the use of evidence
13. Stimulus (accepted) --/-> answer choices (affected or determined) cannot be true.
3 incorrect answer traps (weaken)
Family #4: Disprove
Rules for Family #3
Primary Objective #3
14. 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.
'Additional' Premise Indicators
Words used to introduce cause and effect relationships. (memorize)
3 logical features of conditional reasoning
How to approach causality and strengthen questions?
15. 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
Main Point Questions
Numbers and percentage errors
Resolve the Paradox question stem features
Words used to introduce numerical ideas
16. 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
Time shift errors
Assumptions and causality: typical correct answer categories
Words used to introduce numerical ideas
Weaken question signal words
17. 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?
Rules for Family #3
Necessary Condition
Primary Objective #3
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
Primary Objective #5
Family #1: Prove
Primary Objective #6
19. Thus - therefore - hence - consequently - as a result - so - accordingly - clearly - must be that - shows that - conclude that - follows that - for this reason.
Necessary Condition
Conclusion Indicators
the unless equation (conditional reasoning)
Premise Indicators
20. 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.
Sufficient Condition
Main Point Questions
Prephrasing Method of Reasoning questions
What is the biggest reason students miss questions?
21. If the stimulus contains an argument - determine whether the argument is strong or weak.
Common weakening scenarios
Primary Objective #3
LSAT Conclusion trick for Method AP questions
LSAT Definition of 'either/or'
22. 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 #1: Prove
the unless equation (conditional reasoning)
Premise Indicators
Family #2: Help
23. 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
the unless equation (conditional reasoning)
Solving Parallel Reasoning questions in the order stated
Words used to introduce a sufficient condition
Family #4: Disprove
24. 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 #2
Causal statements
2 roles played by assumptions
Common weakening scenarios
25. 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
Primary Objective #4
How to identify Justify the Conclusion questions
Errors of composition and division
26. 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.
Mistaken Reversal
Logical opposites
How to determine the strength of an argument
Method of Reasoning questions
27. 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
2 roles played by assumptions
Appeal Fallacies
One of the most commonly used stimulus structures is what? How are they recognized?
Quantity indicators
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
Errors in the use of evidence
Primary Objective #4
Probability indicators
Weaken question signal words
29. To logically negate a conditional statement - negate the necessary condition. Example: neither...nor becomes either...or.
Resolve the Paradox question stem features
Logical negation
Rules for Family #3
Assumption Negation Technique
30. At least on of the two - possibly both.
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31. 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
'Additional' Premise Indicators
Conclusion Indicators
Mistaken Reversal
32. 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
Causal statements
Assumption Negation Technique
False analogy
33. 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
Errors of conditional reasoning
Common features of Resolve the Paradox
Logical negation
Survey errors
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
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
LSAT Conclusion trick for Method AP questions
Method of Reasoning
Counter Premise Indicators
35. If the stimulus contains an argument - identify the conclusion. If the stimulus contains a fact set - examine each fact.
How to solve Justify questions mechanistically
Mistaken Negation
Primary Objective #2
False analogy
36. 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.
Probability indicators
Conclusion Indicators
Errors of conditional reasoning
Premise Indicators
37. 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
Rules for Family #3
General lack of relevant evidence for the conclusion
Family #3: Hurt
Assumption Negation Technique
38. 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 approach causality and strengthen questions?
Family #1: Prove
Assumptions and conditionality: the two types of answer choices normally produced are?
Main Point Questions
39. 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
3 logical features of conditional reasoning
How to attack a causal conclusion
Rules for Family #1
Errors of composition and division
40. 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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41. 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
Things to remember in regards to WEAKEN questions
How to solve Justify questions mechanistically
Words used to introduce percentage ideas
Mistaken Reversal
42. Occurs when an author makes conflicting statements. n
Internal contradiction AKA self contradiction
Words used to introduce percentage ideas
Family #4: Disprove
Primary Objective #6
43. 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
Counter Premise Indicators
Primary Objective #2
3 incorrect answer traps (weaken)
'Additional' Premise Indicators
44. Carefully read and identify the question stem. DO NOT assume that certain words are automatically associated with certain questions types.
Numbers and percentage errors
Primary Objective #5
False dilemma
One of the most commonly used stimulus structures is what? How are they recognized?
45. 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
Errors of composition and division
Internal contradiction AKA self contradiction
Solving Parallel Reasoning questions in the order stated
Counter Premise Indicators
46. 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
Method of Reasoning questions
3 quirks of assumption question answer choices
How to attack a causal conclusion
Counter Premise Indicators
47. 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
Primary Objective #7
Conclusion definition
3 incorrect answer traps (weaken)
How to strengthen an argument
48. Then - only - only if - must - required - unless - except - until - without.
Appeal Fallacies
Primary Objective #2
Typical assumption question stems
Words used to introduce a necessary condition
49. An event or circumstance whose occurrence indicates that a necessary condition must also occur.
Sufficient Condition
Words used to introduce percentage ideas
Primary Objective #6
Family #4: Disprove
50. Assumes that only 2 courses of action are available when there may be others. n
Primary Objective #3
3 logical features of conditional reasoning
Numbers and percentage errors
False dilemma