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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. Occurs when an author improperly equates a percentage with a definate quantity or vice versa. n
Rules for Family #1
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
How to attack a causal conclusion
Numbers and percentage errors
2. If all 5 answer choices appear to be 'losers' - return to the stimulus and re-evaluate the argument.
Premise definition
Words used to introduce percentage ideas
What is the biggest reason students miss questions?
Primary Objective #9
3. 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
Prephrasing Method of Reasoning questions
How to approach causality and strengthen questions?
Errors of conditional reasoning
4. Then - only - only if - must - required - unless - except - until - without.
Words used to introduce a necessary condition
Primary Objective #9
Probability indicators
Words used to introduce a sufficient condition
5. 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
Assumptions and causality: typical correct answer categories
2 speaker questions
Mistaken Negation
Resolve the Paradox question stem features
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
Typical assumption question stems
Rules for Family #2
'Additional' Premise Indicators
Time shift errors
7. 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
Primary Objective #7
3 quirks of assumption question answer choices
Rules for Family #3
Numbers and percentage errors
8. 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
Things to remember in regards to WEAKEN questions
Rules for Family #1
Mistaken cause and effect
Incorrect answers in Point at Issue questions
9. 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
Solving Parallel Reasoning questions in the order stated
Rules for Family #3
Prephrasing Method of Reasoning questions
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
10. 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
Primary Objective #6
Survey errors
Assumptions and causality: typical correct answer categories
What is the biggest reason students miss questions?
11. Occurs when an author makes conflicting statements. n
Errors of conditional reasoning
Words used to introduce cause and effect relationships. (memorize)
Internal contradiction AKA self contradiction
Premise Indicators
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
Method of Reasoning questions
Justify the conclusion formula
Words used to introduce a necessary condition
How to identify Justify the Conclusion questions
13. Assumes that only 2 courses of action are available when there may be others. n
Main Point Questions
False dilemma
Circular reasoning
Rules for Family #1
14. 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+.
'Additional' Premise Indicators
Mistaken Reversal
Errors of conditional reasoning
Method of Reasoning
15. 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.
Internal contradiction AKA self contradiction
Family #1: Prove
3 incorrect answer traps (weaken)
Assumptions and conditionality: the two types of answer choices normally produced are?
16. 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.
Primary Objective #9
What is the biggest reason students miss questions?
Primary Objective #1
Internal contradiction AKA self contradiction
17. 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
Prephrasing Method of Reasoning questions
Exceptional case/over generalization
Words used to introduce numerical ideas
Fundamental rules for strengthen - justify the conclusion and assumption questions
18. 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
False dilemma
Family #4: Disprove
Primary Objective #4
How to solve Justify questions mechanistically
19. 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.
Premise Indicators
Family #4: Disprove
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
Numbers and percentages Common misconceptions
20. Carefully read and identify the question stem. DO NOT assume that certain words are automatically associated with certain questions types.
Primary Objective #5
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
How to solve Justify questions mechanistically
How to attack a causal conclusion
21. 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
3 incorrect answer traps (weaken)
Incorrect answers in Point at Issue questions
Assumptions and conditionality: the two types of answer choices normally produced are?
'Additional' Premise Indicators
22. 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
Family #3: Hurt
Counter Premise Indicators
Incorrect answers in Point at Issue questions
Justify the conclusion formula
23. 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
Fact test for Method of Reasoning questions
False dilemma
Fundamental rules for strengthen - justify the conclusion and assumption questions
Primary Objective #8
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?
Mistaken Negation
2 speaker questions
Conclusion definition
Source argument AKA ad hominen
25. Determine whether the stimulus contains an argument or if it is only a set of factual statements. MUST recognize whether a conclusion is present.
Probability indicators
How to solve Justify questions mechanistically
Primary Objective #1
Assumptions and conditionality: the two types of answer choices normally produced are?
26. 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
General lack of relevant evidence for the conclusion
Main Point Questions
How to determine the strength of an argument
Weaken question signal words
27. Thus - therefore - hence - consequently - as a result - so - accordingly - clearly - must be that - shows that - conclude that - follows that - for this reason.
Common features of Resolve the Paradox
Numbers and percentages Common misconceptions
Straw Man
Conclusion Indicators
28. 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?
Family #4: Disprove
Sufficient Condition
Numbers and percentages Common misconceptions
29. 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
Words used to introduce a sufficient condition
Appeal Fallacies
Causal statements
Errors of conditional reasoning
30. 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
2 roles played by assumptions
Numbers and percentage errors
Source argument AKA ad hominen
How to solve Justify questions mechanistically
31. 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
Straw Man
Central assumption of causal conclusions
Weaken question signal words
Necessary Condition
32. 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 -
Counter Premise Indicators
Probability indicators
Words used to introduce a sufficient condition
Time shift errors
33. Stimulus (affected or determined)--/-> answer choices (accepted) Negative sign on the arrow reflects attacking or hurting the argument (weaken).
Family #3: Hurt
Mistaken Negation
Family #2: Help
Resolve the Paradox question stem features
34. If the stimulus contains an argument - identify the conclusion. If the stimulus contains a fact set - examine each fact.
Primary Objective #2
What is the biggest reason students miss questions?
Words used to introduce numerical ideas
Primary Objective #4
35. 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
Incorrect answers in Point at Issue questions
Errors in the use of evidence
Rules for Family #2
Main Point Questions
36. Stimulus (affected or determined) ---> answer choices (accepted) AKA: Help Family assumption - justify the conclusion - strengthen/support - resolve the paradox.
Sufficient Condition
Primary Objective #5
Words used to introduce a sufficient condition
Family #2: Help
37. 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
Source argument AKA ad hominen
Words used to introduce percentage ideas
What is the biggest reason students miss questions?
Numbers and percentage errors
38. 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
One of the most commonly used stimulus structures is what? How are they recognized?
Conclusion Indicators
3 quirks of assumption question answer choices
Assumption Negation Technique
39. Amount - quantity - sum - total - count - tally.n
Conclusion Indicators
Primary Objective #7
Words used to introduce numerical ideas
Words used to introduce percentage ideas
40. 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
Resolve the Paradox question stem features
Source argument AKA ad hominen
Conclusion Identification Method
Errors in the use of evidence
41. 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
Primary Objective #4
Incorrect Method of Reasoning answers
Errors in the use of evidence
Fact test for Method of Reasoning questions
42. 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
Survey errors
How to strengthen an argument
Logical negation
How to attack a causal conclusion
43. At least on of the two - possibly both.
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44. 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
Logical opposites
Solving Parallel Reasoning questions in the order stated
Counter Premise Indicators
Time shift errors
45. Negates both conditions - creating a statement that does not have to be true. Given: A+ --> Study Mistaken Negation: Not A+ --> Not Study
Things to remember in regards to WEAKEN questions
General lack of relevant evidence for the conclusion
Mistaken Negation
How to determine the strength of an argument
46. 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
Assumptions and conditionality: the two types of answer choices normally produced are?
Probability indicators
Conclusion Identification Method
2 speaker questions
47. 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
Main Point Questions
Justify the conclusion formula
Mistaken Reversal
Straw Man
48. Premises + answer choice = conclusion When approaching answers - separate them into winners and losers - then apply the justify formula.
Logical opposites
Justify the conclusion formula
Words used to introduce a sufficient condition
Errors of conditional reasoning
49. Percent - proportion - fraction - ratio - incidence - likelihood - probability - segment - share. n
Rules for Family #1
Typical assumption question stems
'Additional' Premise Indicators
Words used to introduce percentage ideas
50. 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
Method of Reasoning
2 speaker questions
Common weakening scenarios
Errors of conditional reasoning