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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. Premises + answer choice = conclusion When approaching answers - separate them into winners and losers - then apply the justify formula.
Words used to introduce numerical ideas
Primary Objective #6
Errors in the use of evidence
Justify the conclusion formula
2. 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
Main Point Questions
Words used to introduce numerical ideas
Incorrect Method of Reasoning answers
Words used to introduce cause and effect relationships. (memorize)
3. If - when - whenever - every - all - any - people who - in order to.
Conclusion definition
One of the most commonly used stimulus structures is what? How are they recognized?
Premise definition
Words used to introduce a sufficient condition
4. 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
False dilemma
How to attack a causal conclusion
Weakening conditional reasoning
5. 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
Solving Parallel Reasoning questions in the order stated
Common weakening scenarios
LSAT Definition of 'either/or'
Prephrasing Method of Reasoning questions
6. 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
Probability indicators
'Additional' Premise Indicators
Errors of composition and division
Family #4: Disprove
7. 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
Incorrect Method of Reasoning answers
Primary Objective #7
Solving Parallel Reasoning questions in the order stated
Counter Premise Indicators
8. 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.
How to identify Justify the Conclusion questions
What is the biggest reason students miss questions?
Primary Objective #3
Incorrect answers in Point at Issue questions
9. 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.
Primary Objective #6
Family #1: Prove
Rules for Family #3
Primary Objective #2
10. 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
Appeal Fallacies
Solving Parallel Reasoning questions in the order stated
Words used to introduce percentage ideas
Weakening conditional reasoning
11. 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 #8
Incorrect answers in Point at Issue questions
Internal contradiction AKA self contradiction
Numbers and percentages Common misconceptions
12. 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.
Primary Objective #7
'Additional' Premise Indicators
How to identify Justify the Conclusion questions
Primary Objective #8
13. Then - only - only if - must - required - unless - except - until - without.
Words used to introduce a necessary condition
3 logical features of conditional reasoning
2 speaker questions
Primary Objective #7
14. Stimulus (affected or determined)--/-> answer choices (accepted) Negative sign on the arrow reflects attacking or hurting the argument (weaken).
General lack of relevant evidence for the conclusion
Family #3: Hurt
Fact test for Method of Reasoning questions
Words used to introduce percentage ideas
15. Read closely and know precisely what the author said. DO NOT GENERALIZE!.
Primary Objective #4
Errors in the use of evidence
Rules for Family #1
Exceptional case/over generalization
16. Carefully read and identify the question stem. DO NOT assume that certain words are automatically associated with certain questions types.
Typical assumption question stems
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
Primary Objective #5
Logical opposites
17. If all 5 answer choices appear to be 'losers' - return to the stimulus and re-evaluate the argument.
Primary Objective #3
Primary Objective #9
Premise definition
Weakening conditional reasoning
18. 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
Family #2: Help
False analogy
2 roles played by assumptions
Conclusion Indicators
19. An event or circumstance whose occurrence is required in order for a sufficient condition to occur.
One of the most commonly used stimulus structures is what? How are they recognized?
Necessary Condition
Words used to introduce cause and effect relationships. (memorize)
Family #3: Hurt
20. 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.
Mistaken cause and effect
Incorrect Method of Reasoning answers
Premise Indicators
False analogy
21. 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
Incorrect Method of Reasoning answers
Causal statements
3 incorrect answer traps (weaken)
Rules for Family #2
22. 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
Appeal Fallacies
Counter Premise Indicators
False analogy
Straw Man
23. 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.
How to identify Justify the Conclusion questions
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
Resolve the Paradox question stem features
Conclusion Identification Method
24. They often feature 2 conclusions (main and sub.) - when the main conclusion is typically place in the first or second sentence and the last sentence contains the sub. conclusion. The sub. conclusion is set off by conclusion indicators while the main
LSAT Conclusion trick for Method AP questions
the unless equation (conditional reasoning)
Causal statements
Family #3: Hurt
25. Occurs when an author makes conflicting statements. n
Circular reasoning
Internal contradiction AKA self contradiction
One of the most commonly used stimulus structures is what? How are they recognized?
Primary Objective #8
26. Stimulus (affected or determined) ---> answer choices (accepted) AKA: Help Family assumption - justify the conclusion - strengthen/support - resolve the paradox.
Primary Objective #7
Family #2: Help
How to attack a causal conclusion
LSAT Conclusion trick for Method AP questions
27. 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
Incorrect answers in Point at Issue questions
Fundamental rules for strengthen - justify the conclusion and assumption questions
Weaken question signal words
28. Negates both conditions - creating a statement that does not have to be true. Given: A+ --> Study Mistaken Negation: Not A+ --> Not Study
Common features of Resolve the Paradox
Mistaken Negation
Counter Premise Indicators
Family #1: Prove
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
Straw Man
Weakening conditional reasoning
Common features of Resolve the Paradox
Uncertain use of a term or concept
30. Prephrase: after reading the question stem - take a moment to mentally formulate your answer to the question stem.
Appeal Fallacies
Primary Objective #2
Primary Objective #6
Causal statements
31. 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
Assumptions and causality: typical correct answer categories
Sufficient Condition
Assumptions and conditionality: the two types of answer choices normally produced are?
Rules for Family #1
32. Occurs when an author improperly equates a percentage with a definate quantity or vice versa. n
How to attack a causal conclusion
How to strengthen an argument
Primary Objective #1
Numbers and percentage errors
33. 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
Family #2: Help
One of the most commonly used stimulus structures is what? How are they recognized?
Fundamental rules for strengthen - justify the conclusion and assumption questions
Conclusion Identification Method
34. 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
Things to remember in regards to WEAKEN questions
How to strengthen an argument
Family #3: Hurt
Appeal Fallacies
35. 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.
False dilemma
Quantity indicators
Primary Objective #8
2 roles played by assumptions
36. 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
Source argument AKA ad hominen
Method of Reasoning
Assumption Negation Technique
What is the biggest reason students miss questions?
37. 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
Counter Premise Indicators
'Additional' Premise Indicators
Family #1: Prove
Typical assumption question stems
38. 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
LSAT Definition of 'either/or'
Time shift errors
Source argument AKA ad hominen
Prephrasing Method of Reasoning questions
39. 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?
Uncertain use of a term or concept
Conclusion definition
Words used to introduce cause and effect relationships. (memorize)
Words used to introduce numerical ideas
40. 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
3 quirks of assumption question answer choices
Central assumption of causal conclusions
Method of Reasoning
41. 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
'Additional' Premise Indicators
Rules for Family #1
Primary Objective #1
42. 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
Assumptions and causality: typical correct answer categories
Quantity indicators
Time shift errors
Fact test for Method of Reasoning questions
43. 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
Incorrect answers in Point at Issue questions
Resolve the Paradox question stem features
Weakening conditional reasoning
How to determine the strength of an argument
44. 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
Things to remember in regards to WEAKEN questions
Premise Indicators
How to identify Justify the Conclusion questions
45. 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
How to attack a causal conclusion
Primary Objective #2
Fundamental rules for strengthen - justify the conclusion and assumption questions
Fact test for Method of Reasoning questions
46. Percent - proportion - fraction - ratio - incidence - likelihood - probability - segment - share. n
3 logical features of conditional reasoning
Primary Objective #7
Mistaken Negation
Words used to introduce percentage ideas
47. Assumes that only 2 courses of action are available when there may be others. n
Primary Objective #2
Errors of conditional reasoning
Primary Objective #5
False dilemma
48. 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
One of the most commonly used stimulus structures is what? How are they recognized?
Words used to introduce a sufficient condition
Mistaken cause and effect
Central assumption of causal conclusions
49. 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
Logical negation
Incorrect Method of Reasoning answers
How to solve Justify questions mechanistically
Words used to introduce a necessary condition
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.
Numbers and percentage errors
Common weakening scenarios
the unless equation (conditional reasoning)
Time shift errors
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