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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. 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.
Primary Objective #5
Family #4: Disprove
3 logical features of conditional reasoning
Family #1: Prove
2. Occurs when an author makes conflicting statements. n
Internal contradiction AKA self contradiction
Assumption Negation Technique
3 quirks of assumption question answer choices
Assumptions and conditionality: the two types of answer choices normally produced are?
3. 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
Conclusion Identification Method
Primary Objective #4
3 quirks of assumption question answer choices
Circular reasoning
4. 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
Method of Reasoning
Family #4: Disprove
How to solve Justify questions mechanistically
Survey errors
5. 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
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
Central assumption of causal conclusions
One of the most commonly used stimulus structures is what? How are they recognized?
Primary Objective #1
6. 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 -
Primary Objective #1
Counter Premise Indicators
Probability indicators
Words used to introduce a necessary condition
7. 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
Words used to introduce a necessary condition
3 quirks of assumption question answer choices
False analogy
Errors of conditional reasoning
8. 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
Exceptional case/over generalization
Primary Objective #4
Mistaken Reversal
3 logical features of conditional reasoning
9. Read closely and know precisely what the author said. DO NOT GENERALIZE!.
3 quirks of assumption question answer choices
LSAT Conclusion trick for Method AP questions
Primary Objective #3
Primary Objective #4
10. 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
How to solve Justify questions mechanistically
Straw Man
Typical assumption question stems
Family #4: Disprove
11. Immediately look for the repeat or contrapositive in the answer choices. Avoid mistaken reversals and mistaken negations.
Uncertain use of a term or concept
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
How to determine the strength of an argument
Errors of composition and division
12. Occurs when an author improperly equates a percentage with a definate quantity or vice versa. n
Straw Man
Conclusion Indicators
Survey errors
Numbers and percentage errors
13. 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.
Mistaken Reversal
What is the biggest reason students miss questions?
'Additional' Premise Indicators
Quantity indicators
14. 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 #9
Words used to introduce numerical ideas
Primary Objective #7
Causal statements
15. 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
Assumption Negation Technique
Typical assumption question stems
Primary Objective #2
3 logical features of conditional reasoning
16. 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
3 incorrect answer traps (weaken)
Rules for Family #3
How to identify Justify the Conclusion questions
Justify the conclusion formula
17. Premises + answer choice = conclusion When approaching answers - separate them into winners and losers - then apply the justify formula.
Method of Reasoning questions
Method of Reasoning
Justify the conclusion formula
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
18. 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
How to identify Justify the Conclusion questions
LSAT Definition of 'either/or'
False analogy
19. 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
LSAT Conclusion trick for Method AP questions
Necessary Condition
How to solve Justify questions mechanistically
20. Stimulus (accepted) --/-> answer choices (affected or determined) cannot be true.
Errors of composition and division
Common weakening scenarios
2 roles played by assumptions
Family #4: Disprove
21. If all 5 answer choices appear to be 'losers' - return to the stimulus and re-evaluate the argument.
2 speaker questions
Primary Objective #9
Family #3: Hurt
Family #2: Help
22. An event or circumstance whose occurrence is required in order for a sufficient condition to occur.
Assumptions and causality: typical correct answer categories
Necessary Condition
3 quirks of assumption question answer choices
Words used to introduce numerical ideas
23. 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
Source argument AKA ad hominen
How to attack a causal conclusion
Numbers and percentages Common misconceptions
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
24. 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
Straw Man
Primary Objective #2
Central assumption of causal conclusions
Fundamental rules for strengthen - justify the conclusion and assumption questions
25. 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
Logical opposites
Probability indicators
Errors of conditional reasoning
How to approach causality and strengthen questions?
26. 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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27. Stimulus (affected or determined) ---> answer choices (accepted) AKA: Help Family assumption - justify the conclusion - strengthen/support - resolve the paradox.
Method of Reasoning
Rules for Family #1
Counter Premise Indicators
Family #2: Help
28. 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
What is the biggest reason students miss questions?
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
Words used to introduce a sufficient condition
29. 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
Errors of conditional reasoning
Method of Reasoning
Family #3: Hurt
Primary Objective #2
30. 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
Words used to introduce a necessary condition
Numbers and percentage errors
Resolve the Paradox question stem features
31. At least on of the two - possibly both.
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32. Determine whether the stimulus contains an argument or if it is only a set of factual statements. MUST recognize whether a conclusion is present.
Sufficient Condition
Justify the conclusion formula
Weaken question signal words
Primary Objective #1
33. 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
Words used to introduce a necessary condition
Common weakening scenarios
What is the biggest reason students miss questions?
Weakening conditional reasoning
34. 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
Assumptions and conditionality: the two types of answer choices normally produced are?
Straw Man
Uncertain use of a term or concept
Prephrasing Method of Reasoning questions
35. 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
How to approach causality and strengthen questions?
Numbers and percentages Common misconceptions
One of the most commonly used stimulus structures is what? How are they recognized?
36. Carefully read and identify the question stem. DO NOT assume that certain words are automatically associated with certain questions types.
Words used to introduce numerical ideas
Primary Objective #5
Primary Objective #7
Primary Objective #1
37. If - when - whenever - every - all - any - people who - in order to.
3 incorrect answer traps (weaken)
Words used to introduce a sufficient condition
Necessary Condition
Primary Objective #8
38. 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
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
Family #4: Disprove
Causal statements
Main Point Questions
39. 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+.
Rules for Family #3
Mistaken Reversal
Primary Objective #9
3 incorrect answer traps (weaken)
40. Occurs when the author uses an analogy that is two disimilar to the original situation to be applicable. n
Exceptional case/over generalization
False analogy
Numbers and percentage errors
Conclusion definition
41. 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
Solving Parallel Reasoning questions in the order stated
Survey errors
Primary Objective #2
Time shift errors
42. 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
Conclusion definition
Common weakening scenarios
Fact test for Method of Reasoning questions
Quantity indicators
43. Negates both conditions - creating a statement that does not have to be true. Given: A+ --> Study Mistaken Negation: Not A+ --> Not Study
Conclusion Indicators
Premise Indicators
Mistaken Negation
Words used to introduce a necessary condition
44. 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
Common weakening scenarios
How to solve Justify questions mechanistically
Conclusion Identification Method
Fact test for Method of Reasoning questions
45. 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
Things to remember in regards to WEAKEN questions
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
False analogy
46. 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
Typical assumption question stems
Survey errors
Primary Objective #3
Sufficient Condition
47. 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
Method of Reasoning questions
Mistaken Negation
Circular reasoning
Things to remember in regards to WEAKEN questions
48. 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
Source argument AKA ad hominen
How to strengthen an argument
Primary Objective #2
49. 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
Family #1: Prove
Mistaken cause and effect
Resolve the Paradox question stem features
Primary Objective #1
50. 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
How to identify Justify the Conclusion questions
Solving Parallel Reasoning questions in the order stated
Counter Premise Indicators
Mistaken cause and effect