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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. Carefully read and identify the question stem. DO NOT assume that certain words are automatically associated with certain questions types.
Prephrasing Method of Reasoning questions
2 roles played by assumptions
Uncertain use of a term or concept
Primary Objective #5
2. Premises + answer choice = conclusion When approaching answers - separate them into winners and losers - then apply the justify formula.
Premise Indicators
Justify the conclusion formula
How to strengthen an argument
Words used to introduce cause and effect relationships. (memorize)
3. 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.
Words used to introduce a necessary condition
Common features of Resolve the Paradox
Prephrasing Method of Reasoning questions
Appeal Fallacies
4. 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
Rules for Family #1
2 speaker questions
Quantity indicators
Assumptions and conditionality: the two types of answer choices normally produced are?
5. 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
Method of Reasoning questions
the unless equation (conditional reasoning)
Words used to introduce cause and effect relationships. (memorize)
6. 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
Central assumption of causal conclusions
Words used to introduce a sufficient condition
Primary Objective #8
Uncertain use of a term or concept
7. 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
Weaken question signal words
Source argument AKA ad hominen
Premise definition
Fundamental rules for strengthen - justify the conclusion and assumption questions
8. 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
Typical assumption question stems
Justify the conclusion formula
Time shift errors
Source argument AKA ad hominen
9. 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
Primary Objective #4
How to attack a causal conclusion
2 roles played by assumptions
Conclusion Identification Method
10. 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
Solving Parallel Reasoning questions in the order stated
Family #2: Help
Internal contradiction AKA self contradiction
Things to remember in regards to WEAKEN questions
11. 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
Exceptional case/over generalization
Method of Reasoning questions
Incorrect answers in Point at Issue questions
Primary Objective #3
12. Stimulus (affected or determined)--/-> answer choices (accepted) Negative sign on the arrow reflects attacking or hurting the argument (weaken).
Words used to introduce percentage ideas
Family #3: Hurt
Family #1: Prove
Primary Objective #5
13. 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
Mistaken cause and effect
Incorrect answers in Point at Issue questions
Source argument AKA ad hominen
Appeal Fallacies
14. 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.
Numbers and percentage errors
Primary Objective #1
'Additional' Premise Indicators
Logical opposites
15. If - when - whenever - every - all - any - people who - in order to.
Survey errors
Prephrasing Method of Reasoning questions
Words used to introduce a sufficient condition
Assumption Negation Technique
16. 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
Straw Man
Primary Objective #1
Circular reasoning
Logical opposites
17. At least on of the two - possibly both.
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18. Stimulus (affected or determined) ---> answer choices (accepted) AKA: Help Family assumption - justify the conclusion - strengthen/support - resolve the paradox.
Errors of conditional reasoning
Numbers and percentages Common misconceptions
Family #2: Help
Mistaken Negation
19. Percent - proportion - fraction - ratio - incidence - likelihood - probability - segment - share. n
Words used to introduce percentage ideas
Method of Reasoning questions
Primary Objective #1
Primary Objective #2
20. 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
3 incorrect answer traps (weaken)
Resolve the Paradox question stem features
Method of Reasoning questions
'Additional' Premise Indicators
21. 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
How to strengthen an argument
Incorrect answers in Point at Issue questions
How to attack a causal conclusion
General lack of relevant evidence for the conclusion
22. Separate the answer choices into 'contenders' and 'loser'. After completing this process - review the contenders and decide which answer correct.
Main Point Questions
3 incorrect answer traps (weaken)
Primary Objective #8
Primary Objective #9
23. 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
Numbers and percentage errors
One of the most commonly used stimulus structures is what? How are they recognized?
How to approach causality and strengthen questions?
Incorrect Method of Reasoning answers
24. 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 #7
Survey errors
General lack of relevant evidence for the conclusion
25. 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
Probability indicators
Typical assumption question stems
Sufficient Condition
26. 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
Weakening conditional reasoning
Common features of Resolve the Paradox
Errors in the use of evidence
27. 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
Family #1: Prove
Primary Objective #9
Prephrasing Method of Reasoning questions
28. 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?
Primary Objective #5
Conclusion definition
3 logical features of conditional reasoning
Words used to introduce percentage ideas
29. 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
Common weakening scenarios
Words used to introduce numerical ideas
Family #2: Help
How to determine the strength of an argument
30. 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
Source argument AKA ad hominen
Family #1: Prove
Weakening conditional reasoning
Primary Objective #6
31. Read closely and know precisely what the author said. DO NOT GENERALIZE!.
Necessary Condition
Main Point Questions
Primary Objective #4
Premise Indicators
32. 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.
Assumptions and conditionality: the two types of answer choices normally produced are?
Errors in the use of evidence
Conclusion Identification Method
Primary Objective #7
33. Occurs when the author uses an analogy that is two disimilar to the original situation to be applicable. n
False analogy
Family #2: Help
Primary Objective #8
Uncertain use of a term or concept
34. 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?
Primary Objective #4
Circular reasoning
How to determine the strength of an argument
35. 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
How to solve Justify questions mechanistically
Method of Reasoning
3 incorrect answer traps (weaken)
How to determine the strength of an argument
36. 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
Numbers and percentage errors
Fact test for Method of Reasoning questions
Exceptional case/over generalization
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
Counter Premise Indicators
Words used to introduce numerical ideas
Logical negation
How to solve Justify questions mechanistically
38. 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.
Conclusion Indicators
LSAT Definition of 'either/or'
Quantity indicators
Assumptions and conditionality: the two types of answer choices normally produced are?
39. 1. The stem uses the word strengthen or a synonym (support - helps - most justifies) 2. The stem indicates that you should accept the answer choices are true.
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
Uncertain use of a term or concept
Survey errors
LSAT Conclusion trick for Method AP questions
40. An event or circumstance whose occurrence indicates that a necessary condition must also occur.
Sufficient Condition
Numbers and percentages Common misconceptions
Words used to introduce cause and effect relationships. (memorize)
Conclusion definition
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
Main Point Questions
Appeal Fallacies
General lack of relevant evidence for the conclusion
Common weakening scenarios
42. 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
Mistaken Reversal
Mistaken cause and effect
Weakening conditional reasoning
How to solve Justify questions mechanistically
43. 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
Words used to introduce percentage ideas
Conclusion Indicators
3 quirks of assumption question answer choices
Rules for Family #1
44. 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
Primary Objective #4
Premise Indicators
Assumptions and causality: typical correct answer categories
Source argument AKA ad hominen
45. Occurs when an author makes conflicting statements. n
Errors in the use of evidence
Internal contradiction AKA self contradiction
Sufficient Condition
Things to remember in regards to WEAKEN questions
46. Think about the structure of the argument before examining the answer choices. Do not expect to see the exact prephrase - there are too many variations. Make an abstract prephrase then examine each answer to see if it paraphrases the prephrase.n
Primary Objective #3
Prephrasing Method of Reasoning questions
Source argument AKA ad hominen
Uncertain use of a term or concept
47. 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
Source argument AKA ad hominen
2 roles played by assumptions
Errors of composition and division
Fundamental rules for strengthen - justify the conclusion and assumption questions
48. 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
Family #4: Disprove
Common features of Resolve the Paradox
Primary Objective #8
Main Point Questions
49. 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
Conclusion Identification Method
3 incorrect answer traps (weaken)
Mistaken cause and effect
How to solve Justify questions mechanistically
50. Assumes that only 2 courses of action are available when there may be others. n
Sufficient Condition
Incorrect answers in Point at Issue questions
Circular reasoning
False dilemma