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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. 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
Numbers and percentages Common misconceptions
2 speaker questions
Mistaken cause and effect
Survey errors
2. Thus - therefore - hence - consequently - as a result - so - accordingly - clearly - must be that - shows that - conclude that - follows that - for this reason.
How to determine the strength of an argument
Conclusion Indicators
Family #2: Help
Primary Objective #6
3. Carefully read and identify the question stem. DO NOT assume that certain words are automatically associated with certain questions types.
Primary Objective #3
Sufficient Condition
Primary Objective #5
Primary Objective #9
4. 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?
3 logical features of conditional reasoning
Family #1: Prove
Numbers and percentage errors
5. Stimulus (affected or determined)--/-> answer choices (accepted) Negative sign on the arrow reflects attacking or hurting the argument (weaken).
3 quirks of assumption question answer choices
Method of Reasoning questions
Family #3: Hurt
Primary Objective #8
6. 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
Errors of conditional reasoning
Circular reasoning
Words used to introduce numerical ideas
Fact test for Method of Reasoning questions
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
Family #4: Disprove
Rules for Family #3
How to approach causality and strengthen questions?
Incorrect answers in Point at Issue questions
8. 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 attack a causal conclusion
Things to remember in regards to WEAKEN questions
Primary Objective #9
Fact test for Method of Reasoning questions
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
Necessary Condition
Words used to introduce a sufficient condition
Appeal Fallacies
Conclusion Identification Method
10. Read closely and know precisely what the author said. DO NOT GENERALIZE!.
Rules for Family #2
Primary Objective #4
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
Central assumption of causal conclusions
11. 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+.
Sufficient Condition
Mistaken Reversal
One of the most commonly used stimulus structures is what? How are they recognized?
Conclusion Identification Method
12. 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.
How to solve Justify questions mechanistically
Primary Objective #7
3 logical features of conditional reasoning
3 incorrect answer traps (weaken)
13. An event or circumstance whose occurrence is required in order for a sufficient condition to occur.
Logical negation
General lack of relevant evidence for the conclusion
Primary Objective #7
Necessary Condition
14. Percent - proportion - fraction - ratio - incidence - likelihood - probability - segment - share. n
Prephrasing Method of Reasoning questions
Family #4: Disprove
Incorrect answers in Point at Issue questions
Words used to introduce percentage ideas
15. 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
2 speaker questions
Necessary Condition
Primary Objective #3
16. 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 -
Probability indicators
Family #2: Help
Primary Objective #8
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
17. Amount - quantity - sum - total - count - tally.n
Mistaken Reversal
Words used to introduce percentage ideas
Words used to introduce numerical ideas
What is the biggest reason students miss questions?
18. 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
Weakening conditional reasoning
Family #3: Hurt
Source argument AKA ad hominen
Incorrect answers in Point at Issue questions
19. 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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20. 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.
Family #4: Disprove
Straw Man
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
Common features of Resolve the Paradox
21. 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.
Primary Objective #2
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
Common weakening scenarios
Words used to introduce a sufficient condition
22. 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
Incorrect Method of Reasoning answers
Weaken question signal words
How to strengthen an argument
Method of Reasoning
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
Numbers and percentages Common misconceptions
Necessary Condition
2 speaker questions
Things to remember in regards to WEAKEN questions
24. 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
Family #1: Prove
Family #4: Disprove
Weakening conditional reasoning
25. Assumes that only 2 courses of action are available when there may be others. n
Primary Objective #2
False dilemma
Errors of composition and division
Main Point Questions
26. 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?
Uncertain use of a term or concept
Appeal Fallacies
Conclusion definition
Rules for Family #1
27. 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
Uncertain use of a term or concept
Premise Indicators
Justify the conclusion formula
Conclusion Identification Method
28. Occurs when the author uses an analogy that is two disimilar to the original situation to be applicable. n
3 incorrect answer traps (weaken)
How to identify Justify the Conclusion questions
Solving Parallel Reasoning questions in the order stated
False analogy
29. 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
Prephrasing Method of Reasoning questions
Common features of Resolve the Paradox
Source argument AKA ad hominen
How to solve Justify questions mechanistically
30. 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 of composition and division
Primary Objective #1
Weakening conditional reasoning
Straw Man
31. 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
Rules for Family #1
Justify the conclusion formula
Mistaken Negation
Source argument AKA ad hominen
32. 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
Errors of composition and division
Source argument AKA ad hominen
One of the most commonly used stimulus structures is what? How are they recognized?
Primary Objective #6
33. Stimulus (accepted) --/-> answer choices (affected or determined) cannot be true.
Central assumption of causal conclusions
Exceptional case/over generalization
Source argument AKA ad hominen
Family #4: Disprove
34. 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
Errors in the use of evidence
How to attack a causal conclusion
Prephrasing Method of Reasoning questions
Primary Objective #7
35. 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?
Words used to introduce percentage ideas
Errors of conditional reasoning
Main Point Questions
Premise definition
36. 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
Premise Indicators
How to determine the strength of an argument
Words used to introduce percentage ideas
Survey errors
37. At least on of the two - possibly both.
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38. 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
Family #2: Help
Things to remember in regards to WEAKEN questions
Justify the conclusion formula
Logical opposites
39. 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
Prephrasing Method of Reasoning questions
Probability indicators
3 incorrect answer traps (weaken)
Conclusion definition
40. 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.
LSAT Definition of 'either/or'
Words used to introduce cause and effect relationships. (memorize)
False analogy
Mistaken Reversal
41. Occurs when an author improperly equates a percentage with a definate quantity or vice versa. n
Uncertain use of a term or concept
Premise Indicators
Numbers and percentage errors
Sufficient Condition
42. 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
Time shift errors
Justify the conclusion formula
3 logical features of conditional reasoning
43. 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.
Logical negation
Assumption Negation Technique
Quantity indicators
Logical opposites
44. 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
Internal contradiction AKA self contradiction
3 logical features of conditional reasoning
Method of Reasoning questions
Logical negation
45. 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
Resolve the Paradox question stem features
How to identify Justify the Conclusion questions
Mistaken Reversal
Errors of conditional reasoning
46. 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
Circular reasoning
Logical negation
Causal statements
47. 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.
Premise Indicators
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
Rules for Family #3
Primary Objective #7
48. 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
Assumptions and conditionality: the two types of answer choices normally produced are?
2 roles played by assumptions
Rules for Family #3
the unless equation (conditional reasoning)
49. If the stimulus contains an argument - identify the conclusion. If the stimulus contains a fact set - examine each fact.
'Additional' Premise Indicators
Necessary Condition
Family #3: Hurt
Primary Objective #2
50. 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
Incorrect answers in Point at Issue questions
Words used to introduce a sufficient condition
Common weakening scenarios
Uncertain use of a term or concept