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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. 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
Resolve the Paradox question stem features
Premise Indicators
How to approach causality and strengthen questions?
How to identify Justify the Conclusion questions
2. 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
Family #4: Disprove
Words used to introduce numerical ideas
'Additional' Premise Indicators
3. 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
Conclusion definition
LSAT Conclusion trick for Method AP questions
Family #4: Disprove
4. Stimulus (accepted) --/-> answer choices (affected or determined) cannot be true.
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
Family #4: Disprove
Internal contradiction AKA self contradiction
LSAT Conclusion trick for Method AP questions
5. 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
Primary Objective #2
Assumption Negation Technique
Weaken question signal words
'Additional' Premise Indicators
6. 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
Conclusion Identification Method
LSAT Conclusion trick for Method AP questions
Conclusion definition
How to strengthen an argument
7. 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
Appeal Fallacies
Words used to introduce numerical ideas
Fact test for Method of Reasoning questions
3 logical features of conditional reasoning
8. 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
Mistaken Negation
Prephrasing Method of Reasoning questions
LSAT Definition of 'either/or'
Assumptions and causality: typical correct answer categories
9. If - when - whenever - every - all - any - people who - in order to.
Causal statements
Prephrasing Method of Reasoning questions
Words used to introduce a sufficient condition
False analogy
10. Then - only - only if - must - required - unless - except - until - without.
Time shift errors
LSAT Definition of 'either/or'
Counter Premise Indicators
Words used to introduce a necessary condition
11. Separate the answer choices into 'contenders' and 'loser'. After completing this process - review the contenders and decide which answer correct.
Internal contradiction AKA self contradiction
Errors of composition and division
Premise definition
Primary Objective #8
12. To logically negate a conditional statement - negate the necessary condition. Example: neither...nor becomes either...or.
Solving Parallel Reasoning questions in the order stated
Logical negation
Internal contradiction AKA self contradiction
3 incorrect answer traps (weaken)
13. 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 -
Causal statements
Words used to introduce cause and effect relationships. (memorize)
Common weakening scenarios
Probability indicators
14. 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
Mistaken Negation
Assumption Negation Technique
Primary Objective #8
15. 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
How to identify Justify the Conclusion questions
Primary Objective #8
Mistaken cause and effect
Things to remember in regards to WEAKEN questions
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.
Time shift errors
Appeal Fallacies
Primary Objective #1
Survey errors
17. 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
Conclusion Identification Method
Logical opposites
How to approach causality and strengthen questions?
18. 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
Primary Objective #7
One of the most commonly used stimulus structures is what? How are they recognized?
How to strengthen an argument
What is the biggest reason students miss questions?
19. Occurs when an author makes conflicting statements. n
Assumptions and causality: typical correct answer categories
Common features of Resolve the Paradox
Survey errors
Internal contradiction AKA self contradiction
20. 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.
Quantity indicators
Errors of conditional reasoning
Family #2: Help
Internal contradiction AKA self contradiction
21. Prephrase: after reading the question stem - take a moment to mentally formulate your answer to the question stem.
Primary Objective #6
Numbers and percentages Common misconceptions
Family #3: Hurt
How to solve Justify questions mechanistically
22. 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
Premise definition
Necessary Condition
Premise Indicators
Exceptional case/over generalization
23. 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?
Logical negation
Conclusion definition
Source argument AKA ad hominen
How to identify Justify the Conclusion questions
24. Read closely and know precisely what the author said. DO NOT GENERALIZE!.
Errors of composition and division
Primary Objective #4
Mistaken cause and effect
Primary Objective #7
25. 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
Causal statements
Incorrect answers in Point at Issue questions
Family #2: Help
Time shift errors
26. 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
Probability indicators
Mistaken cause and effect
Assumption Negation Technique
Conclusion definition
27. Negates both conditions - creating a statement that does not have to be true. Given: A+ --> Study Mistaken Negation: Not A+ --> Not Study
Numbers and percentages Common misconceptions
Conclusion Indicators
Primary Objective #7
Mistaken Negation
28. An event or circumstance whose occurrence indicates that a necessary condition must also occur.
Quantity indicators
Sufficient Condition
Premise Indicators
Rules for Family #3
29. If all 5 answer choices appear to be 'losers' - return to the stimulus and re-evaluate the argument.
3 quirks of assumption question answer choices
Logical opposites
Primary Objective #9
Words used to introduce a necessary condition
30. Stimulus (affected or determined)--/-> answer choices (accepted) Negative sign on the arrow reflects attacking or hurting the argument (weaken).
Conclusion Indicators
Family #3: Hurt
Weaken question signal words
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
31. 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
Mistaken cause and effect
Errors of conditional reasoning
Primary Objective #4
Numbers and percentage errors
32. 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.
Method of Reasoning
Family #1: Prove
Method of Reasoning questions
Assumptions and conditionality: the two types of answer choices normally produced are?
33. 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
How to determine the strength of an argument
Solving Parallel Reasoning questions in the order stated
Premise Indicators
Family #1: Prove
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
Primary Objective #2
3 quirks of assumption question answer choices
How to approach causality and strengthen questions?
35. 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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36. 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
Mistaken cause and effect
the unless equation (conditional reasoning)
Rules for Family #1
False analogy
37. 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.
Time shift errors
What is the biggest reason students miss questions?
Main Point Questions
Primary Objective #3
38. 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 Method of Reasoning answers
Common weakening scenarios
2 roles played by assumptions
Uncertain use of a term or concept
39. Carefully read and identify the question stem. DO NOT assume that certain words are automatically associated with certain questions types.
Primary Objective #5
'Additional' Premise Indicators
Uncertain use of a term or concept
Time shift errors
40. 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
Circular reasoning
Mistaken Reversal
2 roles played by assumptions
Family #4: Disprove
41. 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
Sufficient Condition
Assumptions and conditionality: the two types of answer choices normally produced are?
Quantity indicators
Numbers and percentages Common misconceptions
42. 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
Internal contradiction AKA self contradiction
Rules for Family #2
Primary Objective #3
Things to remember in regards to WEAKEN questions
43. 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
Family #2: Help
Survey errors
Method of Reasoning
False dilemma
44. If the stimulus contains an argument - determine whether the argument is strong or weak.
Errors of composition and division
Primary Objective #3
Family #1: Prove
Primary Objective #1
45. 1. Whatever term is modified by 'unless' - 'except' - 'until' or 'without' becomes the necessary condition 2. The remaining term is negated and becomes the sufficient condition.
the unless equation (conditional reasoning)
Internal contradiction AKA self contradiction
Survey errors
Things to remember in regards to WEAKEN questions
46. Stimulus (affected or determined) ---> answer choices (accepted) AKA: Help Family assumption - justify the conclusion - strengthen/support - resolve the paradox.
Things to remember in regards to WEAKEN questions
Primary Objective #3
Family #2: Help
Primary Objective #6
47. 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.
Probability indicators
Premise Indicators
Common features of Resolve the Paradox
Errors of composition and division
48. 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 approach causality and strengthen questions?
Assumptions and conditionality: the two types of answer choices normally produced are?
Incorrect answers in Point at Issue questions
How to solve Justify questions mechanistically
49. At least on of the two - possibly both.
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50. Amount - quantity - sum - total - count - tally.n
Words used to introduce numerical ideas
Rules for Family #3
LSAT Definition of 'either/or'
What is the biggest reason students miss questions?