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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. 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
One of the most commonly used stimulus structures is what? How are they recognized?
Survey errors
Rules for Family #1
2. 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
Fact test for Method of Reasoning questions
Errors of composition and division
How to solve Justify questions mechanistically
Mistaken Negation
3. Prephrase: after reading the question stem - take a moment to mentally formulate your answer to the question stem.
2 roles played by assumptions
Straw Man
Weaken question signal words
Primary Objective #6
4. 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
Words used to introduce a sufficient condition
Primary Objective #6
Conclusion definition
Survey errors
5. 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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6. 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
How to determine the strength of an argument
What is the biggest reason students miss questions?
Errors in the use of evidence
7. If the stimulus contains an argument - identify the conclusion. If the stimulus contains a fact set - examine each fact.
Conclusion definition
Logical opposites
Primary Objective #2
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
8. 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
3 quirks of assumption question answer choices
Family #4: Disprove
2 speaker questions
Causal statements
9. Then - only - only if - must - required - unless - except - until - without.
How to identify Justify the Conclusion questions
Primary Objective #5
Words used to introduce a necessary condition
Conclusion Indicators
10. If all 5 answer choices appear to be 'losers' - return to the stimulus and re-evaluate the argument.
Primary Objective #9
Mistaken Negation
Typical assumption question stems
What is the biggest reason students miss questions?
11. 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
General lack of relevant evidence for the conclusion
the unless equation (conditional reasoning)
Words used to introduce percentage ideas
12. Occurs when an author makes conflicting statements. n
Solving Parallel Reasoning questions in the order stated
Counter Premise Indicators
How to determine the strength of an argument
Internal contradiction AKA self contradiction
13. 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
Probability indicators
Sufficient Condition
Weakening conditional reasoning
Primary Objective #9
14. To logically negate a conditional statement - negate the necessary condition. Example: neither...nor becomes either...or.
Numbers and percentage errors
2 roles played by assumptions
Logical negation
Mistaken Negation
15. Occurs when the author uses an analogy that is two disimilar to the original situation to be applicable. n
Straw Man
False analogy
Internal contradiction AKA self contradiction
Fundamental rules for strengthen - justify the conclusion and assumption questions
16. 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
Primary Objective #9
Errors of conditional reasoning
Appeal Fallacies
3 quirks of assumption question answer choices
17. 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.
Quantity indicators
Common features of Resolve the Paradox
Straw Man
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
18. 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?
3 logical features of conditional reasoning
Premise definition
General lack of relevant evidence for the conclusion
Weakening conditional reasoning
19. 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
Numbers and percentage errors
Rules for Family #1
Resolve the Paradox question stem features
20. 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
'Additional' Premise Indicators
Weakening conditional reasoning
Numbers and percentages Common misconceptions
What is the biggest reason students miss questions?
21. If - when - whenever - every - all - any - people who - in order to.
Words used to introduce a sufficient condition
LSAT Definition of 'either/or'
Common features of Resolve the Paradox
Weaken question signal words
22. 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
Rules for Family #1
General lack of relevant evidence for the conclusion
Family #1: Prove
How to identify Justify the Conclusion questions
23. 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
Conclusion Identification Method
Solving Parallel Reasoning questions in the order stated
How to attack a causal conclusion
Conclusion definition
24. 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?
Assumptions and conditionality: the two types of answer choices normally produced are?
Conclusion definition
LSAT Definition of 'either/or'
Words used to introduce numerical ideas
25. 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
LSAT Definition of 'either/or'
Quantity indicators
26. Thus - therefore - hence - consequently - as a result - so - accordingly - clearly - must be that - shows that - conclude that - follows that - for this reason.
Necessary Condition
Conclusion Indicators
How to identify Justify the Conclusion questions
How to strengthen an argument
27. 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
LSAT Conclusion trick for Method AP questions
Assumption Negation Technique
Mistaken Reversal
Conclusion Indicators
28. 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
Prephrasing Method of Reasoning questions
Errors in the use of evidence
Source argument AKA ad hominen
Conclusion Identification Method
29. 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
Sufficient Condition
Mistaken Reversal
Logical negation
Uncertain use of a term or concept
30. 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
3 quirks of assumption question answer choices
Method of Reasoning questions
Words used to introduce a sufficient condition
Incorrect Method of Reasoning answers
31. 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
Incorrect answers in Point at Issue questions
How to determine the strength of an argument
Assumptions and causality: typical correct answer categories
32. 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
How to approach causality and strengthen questions?
Words used to introduce numerical ideas
Words used to introduce percentage ideas
Incorrect answers in Point at Issue questions
33. 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
Sufficient Condition
Premise Indicators
Conclusion Indicators
34. 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
How to approach causality and strengthen questions?
Main Point Questions
Central assumption of causal conclusions
Primary Objective #4
35. 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 #3
Source argument AKA ad hominen
Causal statements
Words used to introduce numerical ideas
36. 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
Primary Objective #4
Weaken question signal words
Counter Premise Indicators
Mistaken Negation
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
Incorrect answers in Point at Issue questions
Numbers and percentage errors
Mistaken cause and effect
Primary Objective #3
38. 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
Internal contradiction AKA self contradiction
Assumptions and conditionality: the two types of answer choices normally produced are?
Errors in the use of evidence
39. 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
Mistaken cause and effect
Counter Premise Indicators
Method of Reasoning
40. 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
Rules for Family #1
Errors of composition and division
How to strengthen an argument
One of the most commonly used stimulus structures is what? How are they recognized?
41. Stimulus (affected or determined)--/-> answer choices (accepted) Negative sign on the arrow reflects attacking or hurting the argument (weaken).
'Additional' Premise Indicators
Quantity indicators
Family #3: Hurt
Counter Premise Indicators
42. 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.
Family #4: Disprove
What is the biggest reason students miss questions?
Probability indicators
How to approach causality and strengthen questions?
43. 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.
Numbers and percentage errors
Primary Objective #7
Family #4: Disprove
Words used to introduce a necessary condition
44. Negates both conditions - creating a statement that does not have to be true. Given: A+ --> Study Mistaken Negation: Not A+ --> Not Study
Mistaken Negation
How to strengthen an argument
How to determine the strength of an argument
'Additional' Premise Indicators
45. 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
Primary Objective #5
How to determine the strength of an argument
Weakening conditional reasoning
Primary Objective #7
46. Assumes that only 2 courses of action are available when there may be others. n
Probability indicators
LSAT Definition of 'either/or'
3 incorrect answer traps (weaken)
False dilemma
47. If the stimulus contains an argument - determine whether the argument is strong or weak.
Assumptions and conditionality: the two types of answer choices normally produced are?
Primary Objective #3
How to determine the strength of an argument
Primary Objective #5
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
Fact test for Method of Reasoning questions
Main Point Questions
3 incorrect answer traps (weaken)
Things to remember in regards to WEAKEN questions
49. 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
Method of Reasoning
Words used to introduce a necessary condition
Mistaken cause and effect
Family #2: Help
50. 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.
Survey errors
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
the unless equation (conditional reasoning)
How to determine the strength of an argument