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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. 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
Source argument AKA ad hominen
Fact test for Method of Reasoning questions
Conclusion Identification Method
Words used to introduce percentage ideas
2. 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
Typical assumption question stems
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
Assumption Negation Technique
How to approach causality and strengthen questions?
3. 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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4. Premises + answer choice = conclusion When approaching answers - separate them into winners and losers - then apply the justify formula.
Justify the conclusion formula
Logical negation
Central assumption of causal conclusions
Fundamental rules for strengthen - justify the conclusion and assumption questions
5. 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
Rules for Family #1
Survey errors
Central assumption of causal conclusions
Conclusion Indicators
6. 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.
Common weakening scenarios
Common features of Resolve the Paradox
Internal contradiction AKA self contradiction
the unless equation (conditional reasoning)
7. They can be in the premises or conclusion. If they are in the conclusion the argument is flawed. Classic mistaken cause and effect reasoning refers to occurences when a causal assertion is made in the conclusion or the conclusion presumes a causal re
Causal statements
Probability indicators
Assumptions and causality: typical correct answer categories
Assumption Negation Technique
8. 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
Conclusion Indicators
Fundamental rules for strengthen - justify the conclusion and assumption questions
Words used to introduce a necessary condition
Solving Parallel Reasoning questions in the order stated
9. Occurs when an author improperly equates a percentage with a definate quantity or vice versa. n
Numbers and percentage errors
Incorrect Method of Reasoning answers
Errors of conditional reasoning
Justify the conclusion formula
10. 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
Justify the conclusion formula
Resolve the Paradox question stem features
Primary Objective #5
Weaken question signal words
11. 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
Primary Objective #3
False dilemma
Mistaken Reversal
Rules for Family #1
12. Immediately look for the repeat or contrapositive in the answer choices. Avoid mistaken reversals and mistaken negations.
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
Things to remember in regards to WEAKEN questions
How to attack a causal conclusion
3 logical features of conditional reasoning
13. Negates both conditions - creating a statement that does not have to be true. Given: A+ --> Study Mistaken Negation: Not A+ --> Not Study
Mistaken Negation
General lack of relevant evidence for the conclusion
Necessary Condition
Family #1: Prove
14. 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
Internal contradiction AKA self contradiction
Common features of Resolve the Paradox
Method of Reasoning
LSAT Definition of 'either/or'
15. An event or circumstance whose occurrence is required in order for a sufficient condition to occur.
Quantity indicators
How to determine the strength of an argument
Necessary Condition
Numbers and percentage errors
16. 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
Words used to introduce a sufficient condition
Primary Objective #6
Probability indicators
Conclusion Identification Method
17. If the stimulus contains an argument - identify the conclusion. If the stimulus contains a fact set - examine each fact.
Primary Objective #2
Common features of Resolve the Paradox
Weaken question signal words
Family #3: Hurt
18. 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.
Words used to introduce cause and effect relationships. (memorize)
Assumption Negation Technique
'Additional' Premise Indicators
Resolve the Paradox question stem features
19. 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 -
Common features of Resolve the Paradox
3 quirks of assumption question answer choices
Probability indicators
Justify the conclusion formula
20. 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
Words used to introduce a sufficient condition
Errors in the use of evidence
How to strengthen an argument
Primary Objective #5
21. 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
Family #4: Disprove
Prephrasing Method of Reasoning questions
Common weakening scenarios
Circular reasoning
22. 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?
Assumption Negation Technique
Words used to introduce a necessary condition
Primary Objective #4
23. 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
Incorrect answers in Point at Issue questions
Rules for Family #3
Resolve the Paradox question stem features
False analogy
24. 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.
Primary Objective #5
Conclusion Identification Method
Numbers and percentages Common misconceptions
Common features of Resolve the Paradox
25. Occurs when an author makes conflicting statements. n
2 speaker questions
Source argument AKA ad hominen
Internal contradiction AKA self contradiction
Mistaken Negation
26. Prephrase: after reading the question stem - take a moment to mentally formulate your answer to the question stem.
Things to remember in regards to WEAKEN questions
Assumptions and causality: typical correct answer categories
Primary Objective #6
Errors of conditional reasoning
27. 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
Assumptions and causality: typical correct answer categories
3 logical features of conditional reasoning
Things to remember in regards to WEAKEN questions
Premise definition
28. Usually have one male and one female. The female uses sound reasoning and the male uses flawed reasoning or makes a mistake. This is not always true - but more often than not.n
2 speaker questions
Family #3: Hurt
Conclusion Indicators
LSAT Conclusion trick for Method AP questions
29. 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
Rules for Family #3
Primary Objective #2
Exceptional case/over generalization
30. 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
Assumptions and causality: typical correct answer categories
Prephrasing Method of Reasoning questions
Straw Man
How to solve Justify questions mechanistically
31. An event or circumstance whose occurrence indicates that a necessary condition must also occur.
Conclusion Identification Method
Sufficient Condition
Words used to introduce a necessary condition
'Additional' Premise Indicators
32. 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
How to strengthen an argument
Assumptions and conditionality: the two types of answer choices normally produced are?
Necessary Condition
Time shift errors
33. To logically negate a conditional statement - negate the necessary condition. Example: neither...nor becomes either...or.
Sufficient Condition
Premise definition
Method of Reasoning
Logical negation
34. 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 Indicators
Justify the conclusion formula
Exceptional case/over generalization
Survey errors
35. 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
Sufficient Condition
Mistaken cause and effect
Incorrect answers in Point at Issue questions
Quantity indicators
36. 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
2 roles played by assumptions
Errors of conditional reasoning
Words used to introduce cause and effect relationships. (memorize)
Words used to introduce percentage ideas
37. 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
Weakening conditional reasoning
Mistaken cause and effect
How to determine the strength of an argument
Solving Parallel Reasoning questions in the order stated
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
Weakening conditional reasoning
Counter Premise Indicators
the unless equation (conditional reasoning)
Uncertain use of a term or concept
39. 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 opposites
3 logical features of conditional reasoning
False dilemma
2 roles played by assumptions
40. 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
Common weakening scenarios
Mistaken Reversal
One of the most commonly used stimulus structures is what? How are they recognized?
Conclusion Identification Method
41. 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
Words used to introduce a necessary condition
Family #3: Hurt
Incorrect answers in Point at Issue questions
42. Stimulus (affected or determined) ---> answer choices (accepted) AKA: Help Family assumption - justify the conclusion - strengthen/support - resolve the paradox.
Family #2: Help
Weakening conditional reasoning
Rules for Family #2
Exceptional case/over generalization
43. 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
Survey errors
Fundamental rules for strengthen - justify the conclusion and assumption questions
General lack of relevant evidence for the conclusion
Justify the conclusion formula
44. 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
What is the biggest reason students miss questions?
Incorrect Method of Reasoning answers
How to strengthen an argument
Assumptions and conditionality: the two types of answer choices normally produced are?
45. 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 #9
Counter Premise Indicators
Primary Objective #4
Prephrasing Method of Reasoning questions
46. 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?
the unless equation (conditional reasoning)
Premise definition
Circular reasoning
Source argument AKA ad hominen
47. 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
Logical negation
Mistaken Reversal
Words used to introduce a necessary condition
48. 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
Errors of composition and division
3 quirks of assumption question answer choices
Assumptions and conditionality: the two types of answer choices normally produced are?
Causal statements
49. 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.
Assumptions and causality: typical correct answer categories
How to solve Justify questions mechanistically
Quantity indicators
Primary Objective #2
50. 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
LSAT Definition of 'either/or'
Primary Objective #3
Straw Man