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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. 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
Family #4: Disprove
Common features of Resolve the Paradox
Exceptional case/over generalization
Incorrect answers in Point at Issue questions
2. 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
Weaken question signal words
Rules for Family #1
Common weakening scenarios
Words used to introduce cause and effect relationships. (memorize)
3. Assumes that only 2 courses of action are available when there may be others. n
Family #4: Disprove
Rules for Family #2
False dilemma
Family #3: Hurt
4. 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
Incorrect Method of Reasoning answers
Time shift errors
Family #1: Prove
5. 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
Weakening conditional reasoning
Things to remember in regards to WEAKEN questions
Words used to introduce a sufficient condition
Necessary Condition
6. 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
Errors of conditional reasoning
Fundamental rules for strengthen - justify the conclusion and assumption questions
'Additional' Premise Indicators
Primary Objective #7
7. Immediately look for the repeat or contrapositive in the answer choices. Avoid mistaken reversals and mistaken negations.
False dilemma
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
Words used to introduce percentage ideas
Primary Objective #2
8. 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
Sufficient Condition
Primary Objective #9
Prephrasing Method of Reasoning questions
Errors in the use of evidence
9. 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
Probability indicators
Common weakening scenarios
Appeal Fallacies
Survey errors
10. 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
Premise definition
Assumption Negation Technique
3 incorrect answer traps (weaken)
Method of Reasoning
11. 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
False dilemma
How to approach causality and strengthen questions?
Assumptions and causality: typical correct answer categories
How to attack a causal conclusion
12. 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
Errors of composition and division
One of the most commonly used stimulus structures is what? How are they recognized?
Resolve the Paradox question stem features
Solving Parallel Reasoning questions in the order stated
13. 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
How to approach causality and strengthen questions?
Sufficient Condition
Family #4: Disprove
Incorrect Method of Reasoning answers
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
Method of Reasoning
Fundamental rules for strengthen - justify the conclusion and assumption questions
Sufficient Condition
How to identify Justify the Conclusion questions
15. 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
Central assumption of causal conclusions
Primary Objective #9
Main Point Questions
LSAT Conclusion trick for Method AP questions
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
Quantity indicators
Things to remember in regards to WEAKEN questions
Mistaken cause and effect
How to solve Justify questions mechanistically
17. 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
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
Conclusion Identification Method
the unless equation (conditional reasoning)
Errors in the use of evidence
18. 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
2 speaker questions
Fundamental rules for strengthen - justify the conclusion and assumption questions
Conclusion definition
Errors of composition and division
19. Percent - proportion - fraction - ratio - incidence - likelihood - probability - segment - share. n
Words used to introduce numerical ideas
Common features of Resolve the Paradox
One of the most commonly used stimulus structures is what? How are they recognized?
Words used to introduce percentage ideas
20. 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
LSAT Conclusion trick for Method AP questions
Method of Reasoning questions
Words used to introduce percentage ideas
Typical assumption question stems
21. 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
Method of Reasoning
Internal contradiction AKA self contradiction
Rules for Family #3
22. If - when - whenever - every - all - any - people who - in order to.
Words used to introduce cause and effect relationships. (memorize)
Primary Objective #9
Quantity indicators
Words used to introduce a sufficient condition
23. If the stimulus contains an argument - identify the conclusion. If the stimulus contains a fact set - examine each fact.
3 incorrect answer traps (weaken)
Method of Reasoning questions
Necessary Condition
Primary Objective #2
24. If the stimulus contains an argument - determine whether the argument is strong or weak.
Primary Objective #3
Exceptional case/over generalization
Words used to introduce a necessary condition
Incorrect Method of Reasoning answers
25. 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
Errors in the use of evidence
Weaken question signal words
LSAT Conclusion trick for Method AP questions
How to attack a causal conclusion
26. 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 conditional reasoning
Assumptions and conditionality: the two types of answer choices normally produced are?
Mistaken Negation
Primary Objective #7
27. 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
Logical negation
How to attack a causal conclusion
Errors of conditional reasoning
Words used to introduce numerical ideas
28. 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?
Mistaken cause and effect
Conclusion definition
Errors of conditional reasoning
3 incorrect answer traps (weaken)
29. 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.
Things to remember in regards to WEAKEN questions
Quantity indicators
Sufficient Condition
Time shift errors
30. 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
Conclusion definition
Survey errors
What is the biggest reason students miss questions?
Sufficient Condition
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
Internal contradiction AKA self contradiction
Errors of composition and division
2 speaker questions
Appeal Fallacies
32. A. Eliminates an alternate cause for the stated effect B. Shows that when the cause occurs - the effect occurs - assumption answers affirm the cause/effect relationship C. Show that when the cause does not occur - the effect doe not occur D. Eliminat
Assumptions and causality: typical correct answer categories
2 roles played by assumptions
Numbers and percentage errors
Central assumption of causal conclusions
33. 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
Method of Reasoning
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
3 quirks of assumption question answer choices
'Additional' Premise Indicators
34. 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.
Quantity indicators
Primary Objective #7
Words used to introduce a sufficient condition
Family #2: Help
35. 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
Weakening conditional reasoning
Errors of conditional reasoning
Circular reasoning
Numbers and percentages Common misconceptions
36. 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
Incorrect Method of Reasoning answers
Time shift errors
Primary Objective #1
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
37. 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
Words used to introduce cause and effect relationships. (memorize)
Counter Premise Indicators
Weakening conditional reasoning
How to determine the strength of an argument
38. 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
Solving Parallel Reasoning questions in the order stated
False analogy
Survey errors
Family #4: Disprove
39. 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
Weaken question signal words
3 quirks of assumption question answer choices
Source argument AKA ad hominen
Things to remember in regards to WEAKEN questions
40. 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
What is the biggest reason students miss questions?
Primary Objective #8
Straw Man
41. 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
Sufficient Condition
Primary Objective #2
Straw Man
Incorrect answers in Point at Issue questions
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.
LSAT Definition of 'either/or'
Family #4: Disprove
What is the biggest reason students miss questions?
Justify the conclusion formula
43. Carefully read and identify the question stem. DO NOT assume that certain words are automatically associated with certain questions types.
Assumption Negation Technique
Survey errors
Mistaken Reversal
Primary Objective #5
44. 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.
Words used to introduce numerical ideas
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
Straw Man
Fact test for Method of Reasoning questions
45. Stimulus (affected or determined)--/-> answer choices (accepted) Negative sign on the arrow reflects attacking or hurting the argument (weaken).
Typical assumption question stems
Primary Objective #7
Family #3: Hurt
Rules for Family #1
46. 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
Primary Objective #6
2 roles played by assumptions
Logical negation
Weakening conditional reasoning
47. 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
3 logical features of conditional reasoning
Premise definition
Words used to introduce percentage ideas
3 incorrect answer traps (weaken)
48. 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
Errors of conditional reasoning
Errors in the use of evidence
Words used to introduce cause and effect relationships. (memorize)
Conclusion Identification Method
49. Amount - quantity - sum - total - count - tally.n
How to determine the strength of an argument
Words used to introduce numerical ideas
Logical opposites
Assumptions and causality: typical correct answer categories
50. An event or circumstance whose occurrence is required in order for a sufficient condition to occur.
Common weakening scenarios
Necessary Condition
Premise definition
Family #1: Prove