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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. 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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2. 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
Assumptions and conditionality: the two types of answer choices normally produced are?
Central assumption of causal conclusions
Premise Indicators
Mistaken Negation
3. 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
Errors in the use of evidence
2 roles played by assumptions
Weakening conditional reasoning
Mistaken cause and effect
4. Then - only - only if - must - required - unless - except - until - without.
Words used to introduce a necessary condition
Fundamental rules for strengthen - justify the conclusion and assumption questions
Justify the conclusion formula
Method of Reasoning questions
5. 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.
How to determine the strength of an argument
Logical opposites
Words used to introduce a sufficient condition
Time shift errors
6. 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
Common weakening scenarios
Weaken question signal words
How to solve Justify questions mechanistically
Primary Objective #1
7. If - when - whenever - every - all - any - people who - in order to.
Incorrect answers in Point at Issue questions
Things to remember in regards to WEAKEN questions
Words used to introduce a sufficient condition
How to attack a causal conclusion
8. 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.
Conclusion definition
Primary Objective #3
What is the biggest reason students miss questions?
How to strengthen an argument
9. 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
LSAT Conclusion trick for Method AP questions
Mistaken cause and effect
Words used to introduce percentage ideas
Method of Reasoning questions
10. 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
Weaken question signal words
Words used to introduce a necessary condition
Rules for Family #2
Rules for Family #3
11. To logically negate a conditional statement - negate the necessary condition. Example: neither...nor becomes either...or.
Internal contradiction AKA self contradiction
Causal statements
Logical negation
Rules for Family #3
12. 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
Common weakening scenarios
Justify the conclusion formula
Straw Man
2 roles played by assumptions
13. 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
Numbers and percentages Common misconceptions
the unless equation (conditional reasoning)
Things to remember in regards to WEAKEN questions
Conclusion definition
14. 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
Uncertain use of a term or concept
Conclusion Identification Method
Things to remember in regards to WEAKEN questions
3 incorrect answer traps (weaken)
15. Occurs when the author uses an analogy that is two disimilar to the original situation to be applicable. n
Weaken question signal words
Primary Objective #5
False analogy
Source argument AKA ad hominen
16. 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 #6
Primary Objective #3
Conclusion definition
Primary Objective #1
17. 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
General lack of relevant evidence for the conclusion
Common features of Resolve the Paradox
Primary Objective #2
Fact test for Method of Reasoning questions
18. 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
Straw Man
Conclusion Indicators
How to attack a causal conclusion
'Additional' Premise Indicators
19. 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.
Family #1: Prove
Counter Premise Indicators
Circular reasoning
Family #2: Help
20. 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
Weaken question signal words
Primary Objective #2
Conclusion Identification Method
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
21. Immediately look for the repeat or contrapositive in the answer choices. Avoid mistaken reversals and mistaken negations.
Primary Objective #1
Probability indicators
Primary Objective #6
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
22. 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
Conclusion Identification Method
Primary Objective #5
3 logical features of conditional reasoning
LSAT Conclusion trick for Method AP questions
23. 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 #9
Central assumption of causal conclusions
Incorrect answers in Point at Issue questions
2 roles played by assumptions
24. 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
Uncertain use of a term or concept
Errors of composition and division
'Additional' Premise Indicators
25. 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?
Errors of conditional reasoning
Conclusion definition
Words used to introduce a necessary condition
Primary Objective #6
26. 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
Uncertain use of a term or concept
Exceptional case/over generalization
Family #4: Disprove
Mistaken Reversal
27. Occurs when an author makes conflicting statements. n
Internal contradiction AKA self contradiction
2 roles played by assumptions
3 incorrect answer traps (weaken)
Rules for Family #2
28. Carefully read and identify the question stem. DO NOT assume that certain words are automatically associated with certain questions types.
Incorrect answers in Point at Issue questions
Conclusion Indicators
Primary Objective #5
Primary Objective #1
29. 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
Rules for Family #3
One of the most commonly used stimulus structures is what? How are they recognized?
Solving Parallel Reasoning questions in the order stated
Fundamental rules for strengthen - justify the conclusion and assumption questions
30. 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
Causal statements
Incorrect answers in Point at Issue questions
Typical assumption question stems
False analogy
31. An event or circumstance whose occurrence indicates that a necessary condition must also occur.
Family #1: Prove
Sufficient Condition
Incorrect Method of Reasoning answers
Method of Reasoning
32. 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.
Primary Objective #5
Assumptions and causality: typical correct answer categories
Quantity indicators
Internal contradiction AKA self contradiction
33. 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
Typical assumption question stems
Errors in the use of evidence
How to solve Justify questions mechanistically
Rules for Family #2
34. If the stimulus contains an argument - identify the conclusion. If the stimulus contains a fact set - examine each fact.
Primary Objective #2
Prephrasing Method of Reasoning questions
Probability indicators
Source argument AKA ad hominen
35. Separate the answer choices into 'contenders' and 'loser'. After completing this process - review the contenders and decide which answer correct.
Method of Reasoning
Logical opposites
Primary Objective #8
Assumption Negation Technique
36. Assumes that only 2 courses of action are available when there may be others. n
How to determine the strength of an argument
Rules for Family #1
False dilemma
How to attack a causal conclusion
37. 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
Uncertain use of a term or concept
Probability indicators
Counter Premise Indicators
Main Point Questions
38. 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
Conclusion definition
Assumptions and conditionality: the two types of answer choices normally produced are?
Rules for Family #1
One of the most commonly used stimulus structures is what? How are they recognized?
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
Central assumption of causal conclusions
One of the most commonly used stimulus structures is what? How are they recognized?
Rules for Family #1
How to determine the strength of an argument
40. 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
Rules for Family #3
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
3 incorrect answer traps (weaken)
Common features of Resolve the Paradox
41. 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
Method of Reasoning
Primary Objective #5
Probability indicators
Typical assumption question stems
42. An event or circumstance whose occurrence is required in order for a sufficient condition to occur.
Method of Reasoning
3 incorrect answer traps (weaken)
Necessary Condition
Words used to introduce numerical ideas
43. 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 numerical ideas
Source argument AKA ad hominen
LSAT Conclusion trick for Method AP questions
General lack of relevant evidence for the conclusion
44. Occurs when an author improperly equates a percentage with a definate quantity or vice versa. n
Sufficient Condition
Common weakening scenarios
Resolve the Paradox question stem features
Numbers and percentage errors
45. 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
How to determine the strength of an argument
Numbers and percentage errors
Words used to introduce a necessary condition
Mistaken Reversal
46. 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
Time shift errors
Appeal Fallacies
What is the biggest reason students miss questions?
'Additional' Premise Indicators
47. 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+.
Primary Objective #6
Causal statements
Mistaken Reversal
General lack of relevant evidence for the conclusion
48. Stimulus (affected or determined)--/-> answer choices (accepted) Negative sign on the arrow reflects attacking or hurting the argument (weaken).
Primary Objective #9
Family #3: Hurt
Quantity indicators
Words used to introduce percentage ideas
49. 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
Typical assumption question stems
How to attack a causal conclusion
Time shift errors
Family #2: Help
50. 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
What is the biggest reason students miss questions?
Source argument AKA ad hominen
Rules for Family #2
Weaken question signal words