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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. 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.
Conclusion Indicators
Appeal Fallacies
Primary Objective #8
Primary Objective #7
2. An event or circumstance whose occurrence indicates that a necessary condition must also occur.
Sufficient Condition
Uncertain use of a term or concept
Primary Objective #4
Prephrasing Method of Reasoning questions
3. If all 5 answer choices appear to be 'losers' - return to the stimulus and re-evaluate the argument.
3 logical features of conditional reasoning
Primary Objective #9
Primary Objective #1
Logical opposites
4. 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+.
Logical negation
Mistaken Reversal
Causal statements
Circular reasoning
5. 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
Weaken question signal words
Source argument AKA ad hominen
Method of Reasoning questions
6. 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
LSAT Conclusion trick for Method AP questions
Exceptional case/over generalization
Quantity indicators
Rules for Family #2
7. 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.
Logical negation
Fundamental rules for strengthen - justify the conclusion and assumption questions
Common features of Resolve the Paradox
Primary Objective #2
8. Occurs when the author uses an analogy that is two disimilar to the original situation to be applicable. n
Primary Objective #5
Internal contradiction AKA self contradiction
Primary Objective #8
False analogy
9. Carefully read and identify the question stem. DO NOT assume that certain words are automatically associated with certain questions types.
Primary Objective #2
Primary Objective #5
Rules for Family #2
Quantity indicators
10. Assumes that only 2 courses of action are available when there may be others. n
Logical opposites
Numbers and percentage errors
False dilemma
Primary Objective #6
11. 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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12. 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
Logical negation
Numbers and percentages Common misconceptions
Sufficient Condition
How to identify Justify the Conclusion questions
13. 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
Conclusion definition
What is the biggest reason students miss questions?
Necessary Condition
Errors of composition and division
14. 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 solve Justify questions mechanistically
3 incorrect answer traps (weaken)
Time shift errors
Family #1: Prove
15. 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 -
Mistaken Reversal
Assumptions and conditionality: the two types of answer choices normally produced are?
How to determine the strength of an argument
Probability indicators
16. If - when - whenever - every - all - any - people who - in order to.
Words used to introduce a necessary condition
Errors in the use of evidence
Necessary Condition
Words used to introduce a sufficient condition
17. Amount - quantity - sum - total - count - tally.n
Errors of composition and division
General lack of relevant evidence for the conclusion
Quantity indicators
Words used to introduce numerical ideas
18. 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
Primary Objective #3
Numbers and percentages Common misconceptions
Words used to introduce a necessary condition
Family #2: Help
19. An event or circumstance whose occurrence is required in order for a sufficient condition to occur.
Words used to introduce numerical ideas
Necessary Condition
How to identify Justify the Conclusion questions
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
20. 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
Rules for Family #3
Time shift errors
Solving Parallel Reasoning questions in the order stated
21. If the stimulus contains an argument - determine whether the argument is strong or weak.
Method of Reasoning
Common weakening scenarios
Primary Objective #3
Premise definition
22. 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
Central assumption of causal conclusions
How to solve Justify questions mechanistically
Prephrasing Method of Reasoning questions
Mistaken cause and effect
23. 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
False analogy
Assumptions and conditionality: the two types of answer choices normally produced are?
Family #1: Prove
How to approach causality and strengthen questions?
24. 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
Conclusion Indicators
Primary Objective #1
Primary Objective #9
25. 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
Words used to introduce a sufficient condition
Primary Objective #8
Common weakening scenarios
3 logical features of conditional reasoning
26. 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
Assumptions and conditionality: the two types of answer choices normally produced are?
Solving Parallel Reasoning questions in the order stated
Circular reasoning
Fundamental rules for strengthen - justify the conclusion and assumption questions
27. Percent - proportion - fraction - ratio - incidence - likelihood - probability - segment - share. n
Internal contradiction AKA self contradiction
Words used to introduce percentage ideas
Sufficient Condition
Primary Objective #2
28. 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
Method of Reasoning questions
Logical negation
How to identify Justify the Conclusion questions
Fundamental rules for strengthen - justify the conclusion and assumption questions
29. 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
Necessary Condition
Mistaken Negation
Primary Objective #3
Errors in the use of evidence
30. 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
Mistaken cause and effect
Primary Objective #9
Errors in the use of evidence
31. Stimulus (accepted) --/-> answer choices (affected or determined) cannot be true.
Time shift errors
Primary Objective #2
Quantity indicators
Family #4: Disprove
32. Stimulus (affected or determined)--/-> answer choices (accepted) Negative sign on the arrow reflects attacking or hurting the argument (weaken).
Family #3: Hurt
Source argument AKA ad hominen
Sufficient Condition
Justify the conclusion formula
33. 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
Conclusion definition
Central assumption of causal conclusions
Family #1: Prove
Probability indicators
34. 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
How to attack a causal conclusion
Prephrasing Method of Reasoning questions
Counter Premise Indicators
Causal statements
35. 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
Errors in the use of evidence
Central assumption of causal conclusions
Fact test for Method of Reasoning questions
Incorrect Method of Reasoning answers
36. 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
How to attack a causal conclusion
Primary Objective #8
Incorrect answers in Point at Issue questions
37. 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 #1: Prove
How to strengthen an argument
Things to remember in regards to WEAKEN questions
Assumptions and causality: typical correct answer categories
38. 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.
Resolve the Paradox question stem features
Causal statements
Primary Objective #3
Quantity indicators
39. 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 #1
Straw Man
Counter Premise Indicators
Source argument AKA ad hominen
40. 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
Counter Premise Indicators
Logical opposites
Central assumption of causal conclusions
Family #3: Hurt
41. 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.
Justify the conclusion formula
Time shift errors
Words used to introduce cause and effect relationships. (memorize)
Fundamental rules for strengthen - justify the conclusion and assumption questions
42. 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
How to attack a causal conclusion
3 logical features of conditional reasoning
Errors in the use of evidence
LSAT Definition of 'either/or'
43. At least on of the two - possibly both.
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44. 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
How to strengthen an argument
Words used to introduce percentage ideas
Numbers and percentages Common misconceptions
Justify the conclusion formula
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
What is the biggest reason students miss questions?
How to determine the strength of an argument
Rules for Family #1
Necessary Condition
46. 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
How to strengthen an argument
Uncertain use of a term or concept
One of the most commonly used stimulus structures is what? How are they recognized?
Weaken question signal words
47. Prephrase: after reading the question stem - take a moment to mentally formulate your answer to the question stem.
Necessary Condition
Primary Objective #6
Uncertain use of a term or concept
Fact test for Method of Reasoning questions
48. 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
Appeal Fallacies
LSAT Definition of 'either/or'
Logical negation
49. 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.
Incorrect Method of Reasoning answers
3 logical features of conditional reasoning
How to strengthen an argument
Family #1: Prove
50. 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
Assumption Negation Technique
Resolve the Paradox question stem features
Primary Objective #2
3 quirks of assumption question answer choices