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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. 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
LSAT Conclusion trick for Method AP questions
Resolve the Paradox question stem features
How to determine the strength of an argument
Quantity indicators
2. Amount - quantity - sum - total - count - tally.n
Incorrect Method of Reasoning answers
Exceptional case/over generalization
Words used to introduce numerical ideas
Common weakening scenarios
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.
Errors of composition and division
2 speaker questions
Common features of Resolve the Paradox
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
4. If the stimulus contains an argument - identify the conclusion. If the stimulus contains a fact set - examine each fact.
Source argument AKA ad hominen
Fact test for Method of Reasoning questions
Primary Objective #2
Words used to introduce cause and effect relationships. (memorize)
5. If - when - whenever - every - all - any - people who - in order to.
Primary Objective #7
Sufficient Condition
Words used to introduce a sufficient condition
Primary Objective #5
6. 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 #3: Hurt
Causal statements
Numbers and percentage errors
Family #1: Prove
7. 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
Words used to introduce a necessary condition
Incorrect answers in Point at Issue questions
2 roles played by assumptions
Method of Reasoning questions
8. 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
Premise definition
Weaken question signal words
Incorrect answers in Point at Issue questions
9. 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
Family #2: Help
Primary Objective #7
Assumptions and conditionality: the two types of answer choices normally produced are?
How to approach causality and strengthen questions?
10. 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
3 logical features of conditional reasoning
Method of Reasoning
Circular reasoning
Mistaken Reversal
11. 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?
Quantity indicators
Primary Objective #8
Premise definition
Rules for Family #2
12. At least on of the two - possibly both.
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13. 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+.
Mistaken Reversal
Time shift errors
Main Point Questions
Exceptional case/over generalization
14. Negates both conditions - creating a statement that does not have to be true. Given: A+ --> Study Mistaken Negation: Not A+ --> Not Study
Central assumption of causal conclusions
Family #4: Disprove
Things to remember in regards to WEAKEN questions
Mistaken Negation
15. 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
'Additional' Premise Indicators
LSAT Conclusion trick for Method AP questions
Primary Objective #4
Solving Parallel Reasoning questions in the order stated
16. 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
Counter Premise Indicators
Premise definition
Errors of composition and division
17. Occurs when an author improperly equates a percentage with a definate quantity or vice versa. n
Errors of conditional reasoning
Incorrect answers in Point at Issue questions
Common features of Resolve the Paradox
Numbers and percentage errors
18. 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
Exceptional case/over generalization
Incorrect answers in Point at Issue questions
Premise Indicators
19. 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
Resolve the Paradox question stem features
Internal contradiction AKA self contradiction
Time shift errors
Conclusion Identification Method
20. 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
Fundamental rules for strengthen - justify the conclusion and assumption questions
Weakening conditional reasoning
Conclusion Identification Method
Source argument AKA ad hominen
21. 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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22. To logically negate a conditional statement - negate the necessary condition. Example: neither...nor becomes either...or.
How to attack a causal conclusion
Logical negation
Rules for Family #3
Appeal Fallacies
23. Occurs when the author uses an analogy that is two disimilar to the original situation to be applicable. n
False analogy
Method of Reasoning questions
Prephrasing Method of Reasoning questions
Primary Objective #2
24. 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
Assumptions and conditionality: the two types of answer choices normally produced are?
One of the most commonly used stimulus structures is what? How are they recognized?
Method of Reasoning questions
Numbers and percentages Common misconceptions
25. Percent - proportion - fraction - ratio - incidence - likelihood - probability - segment - share. n
Conclusion Indicators
Internal contradiction AKA self contradiction
Incorrect Method of Reasoning answers
Words used to introduce percentage ideas
26. 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
Primary Objective #9
3 quirks of assumption question answer choices
Source argument AKA ad hominen
Causal statements
27. Separate the answer choices into 'contenders' and 'loser'. After completing this process - review the contenders and decide which answer correct.
Resolve the Paradox question stem features
Primary Objective #8
Primary Objective #9
Numbers and percentages Common misconceptions
28. Assumes that only 2 courses of action are available when there may be others. n
How to attack a causal conclusion
False analogy
False dilemma
Assumptions and causality: typical correct answer categories
29. 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
Rules for Family #1
Weakening conditional reasoning
How to solve Justify questions mechanistically
Premise definition
30. 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
3 incorrect answer traps (weaken)
Conclusion Identification Method
Errors of composition and division
Quantity indicators
31. Prephrase: after reading the question stem - take a moment to mentally formulate your answer to the question stem.
LSAT Definition of 'either/or'
Family #2: Help
Primary Objective #6
Primary Objective #2
32. 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
Method of Reasoning questions
Incorrect answers in Point at Issue questions
How to identify Justify the Conclusion questions
Primary Objective #8
33. 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
Assumption Negation Technique
Weaken question signal words
False dilemma
Conclusion Identification Method
34. 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
Weakening conditional reasoning
Prephrasing Method of Reasoning questions
3 logical features of conditional reasoning
Method of Reasoning questions
35. 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
Rules for Family #2
How to approach causality and strengthen questions?
One of the most commonly used stimulus structures is what? How are they recognized?
Common weakening scenarios
36. 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
Numbers and percentages Common misconceptions
One of the most commonly used stimulus structures is what? How are they recognized?
Primary Objective #6
Fact test for Method of Reasoning questions
37. 1. Watch for answers starting with the phrase 'at least one' or 'at least some'. When an assumption answer choice starts with one of these phrases it is usually right. But ALWAYS verify with A.N.T. 2. Avoid answers that claim an idea was the most imp
3 quirks of assumption question answer choices
Solving Parallel Reasoning questions in the order stated
Family #3: Hurt
Primary Objective #4
38. 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
Rules for Family #1
Resolve the Paradox question stem features
Uncertain use of a term or concept
Incorrect answers in Point at Issue questions
39. Immediately look for the repeat or contrapositive in the answer choices. Avoid mistaken reversals and mistaken negations.
Primary Objective #7
2 roles played by assumptions
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
Appeal Fallacies
40. 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?
LSAT Definition of 'either/or'
Conclusion definition
One of the most commonly used stimulus structures is what? How are they recognized?
Primary Objective #1
41. An event or circumstance whose occurrence is required in order for a sufficient condition to occur.
Necessary Condition
Circular reasoning
False analogy
Premise definition
42. 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
LSAT Conclusion trick for Method AP questions
Incorrect Method of Reasoning answers
Conclusion definition
Counter Premise Indicators
43. Stimulus (affected or determined)--/-> answer choices (accepted) Negative sign on the arrow reflects attacking or hurting the argument (weaken).
Family #2: Help
Family #3: Hurt
Conclusion Identification Method
Typical assumption question stems
44. Stimulus (accepted) --/-> answer choices (affected or determined) cannot be true.
Words used to introduce cause and effect relationships. (memorize)
Family #4: Disprove
Primary Objective #2
General lack of relevant evidence for the conclusion
45. 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 -
Mistaken Reversal
Probability indicators
Errors of conditional reasoning
Family #2: Help
46. Thus - therefore - hence - consequently - as a result - so - accordingly - clearly - must be that - shows that - conclude that - follows that - for this reason.
Premise definition
Causal statements
Conclusion Indicators
Assumptions and causality: typical correct answer categories
47. 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.
Common features of Resolve the Paradox
Central assumption of causal conclusions
Logical opposites
Incorrect answers in Point at Issue questions
48. Occurs when an author makes conflicting statements. n
3 quirks of assumption question answer choices
Internal contradiction AKA self contradiction
Assumptions and conditionality: the two types of answer choices normally produced are?
Primary Objective #7
49. 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
Assumptions and conditionality: the two types of answer choices normally produced are?
Logical negation
Incorrect answers in Point at Issue questions
50. Then - only - only if - must - required - unless - except - until - without.
Errors of conditional reasoning
Premise Indicators
Words used to introduce a necessary condition
Prephrasing Method of Reasoning questions