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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. 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
Errors of composition and division
Words used to introduce a sufficient condition
'Additional' Premise Indicators
Counter Premise Indicators
2. 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
Things to remember in regards to WEAKEN questions
Method of Reasoning
Typical assumption question stems
Errors in the use of evidence
3. An event or circumstance whose occurrence is required in order for a sufficient condition to occur.
Necessary Condition
Words used to introduce a necessary condition
Primary Objective #6
3 quirks of assumption question answer choices
4. Thus - therefore - hence - consequently - as a result - so - accordingly - clearly - must be that - shows that - conclude that - follows that - for this reason.
Weakening conditional reasoning
Conclusion Indicators
Conclusion definition
Words used to introduce cause and effect relationships. (memorize)
5. 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
Source argument AKA ad hominen
Fundamental rules for strengthen - justify the conclusion and assumption questions
Assumptions and conditionality: the two types of answer choices normally produced are?
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
6. 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
Conclusion definition
Rules for Family #1
Primary Objective #3
Method of Reasoning questions
7. 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
Prephrasing Method of Reasoning questions
Survey errors
Incorrect answers in Point at Issue questions
3 incorrect answer traps (weaken)
8. If the stimulus contains an argument - identify the conclusion. If the stimulus contains a fact set - examine each fact.
Logical negation
Resolve the Paradox question stem features
Primary Objective #2
Weaken question signal words
9. Stimulus (affected or determined) ---> answer choices (accepted) AKA: Help Family assumption - justify the conclusion - strengthen/support - resolve the paradox.
Family #2: Help
Errors of conditional reasoning
Errors in the use of evidence
Prephrasing Method of Reasoning questions
10. 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
Primary Objective #2
Counter Premise Indicators
Internal contradiction AKA self contradiction
Things to remember in regards to WEAKEN questions
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
How to approach causality and strengthen questions?
Mistaken cause and effect
2 speaker questions
Weaken question signal words
12. 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
Circular reasoning
Common features of Resolve the Paradox
Primary Objective #5
Mistaken cause and effect
13. Stimulus (affected or determined)--/-> answer choices (accepted) Negative sign on the arrow reflects attacking or hurting the argument (weaken).
Family #3: Hurt
Primary Objective #3
Primary Objective #1
Conclusion definition
14. 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
Mistaken Negation
How to attack a causal conclusion
Source argument AKA ad hominen
Fact test for Method of Reasoning questions
15. Assumes that only 2 courses of action are available when there may be others. n
False dilemma
Main Point Questions
Source argument AKA ad hominen
Method of Reasoning questions
16. Amount - quantity - sum - total - count - tally.n
Uncertain use of a term or concept
Family #3: Hurt
Numbers and percentages Common misconceptions
Words used to introduce numerical ideas
17. To logically negate a conditional statement - negate the necessary condition. Example: neither...nor becomes either...or.
Logical negation
3 logical features of conditional reasoning
Conclusion Indicators
Source argument AKA ad hominen
18. 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.
Fundamental rules for strengthen - justify the conclusion and assumption questions
Family #1: Prove
LSAT Definition of 'either/or'
Words used to introduce a necessary condition
19. 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
Causal statements
Time shift errors
Things to remember in regards to WEAKEN questions
20. If the stimulus contains an argument - determine whether the argument is strong or weak.
Rules for Family #2
General lack of relevant evidence for the conclusion
Primary Objective #3
Uncertain use of a term or concept
21. If - when - whenever - every - all - any - people who - in order to.
Primary Objective #3
Primary Objective #9
Words used to introduce a sufficient condition
Primary Objective #6
22. 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
LSAT Definition of 'either/or'
Sufficient Condition
Assumptions and conditionality: the two types of answer choices normally produced are?
Errors of conditional reasoning
23. 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.
LSAT Definition of 'either/or'
Counter Premise Indicators
Logical opposites
Primary Objective #1
24. 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
Mistaken Reversal
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
Assumptions and conditionality: the two types of answer choices normally produced are?
Common weakening scenarios
25. 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
How to determine the strength of an argument
False analogy
Words used to introduce a necessary condition
26. Immediately look for the repeat or contrapositive in the answer choices. Avoid mistaken reversals and mistaken negations.
Causal statements
Typical assumption question stems
Circular reasoning
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
27. 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
Rules for Family #2
3 incorrect answer traps (weaken)
How to approach causality and strengthen questions?
28. 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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29. At least on of the two - possibly both.
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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
Incorrect Method of Reasoning answers
Main Point Questions
Fact test for Method of Reasoning questions
3 incorrect answer traps (weaken)
31. 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
Exceptional case/over generalization
Probability indicators
Assumptions and causality: typical correct answer categories
Conclusion Indicators
32. 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
Assumption Negation Technique
Assumptions and causality: typical correct answer categories
Errors of composition and division
Typical assumption question stems
33. 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
Premise definition
Survey errors
Numbers and percentages Common misconceptions
'Additional' Premise 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
Causal statements
Words used to introduce cause and effect relationships. (memorize)
Central assumption of causal conclusions
Words used to introduce a necessary condition
35. Stimulus (accepted) --/-> answer choices (affected or determined) cannot be true.
Words used to introduce numerical ideas
Errors of composition and division
Family #4: Disprove
Common weakening scenarios
36. 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
Mistaken Negation
Conclusion Indicators
Solving Parallel Reasoning questions in the order stated
False analogy
37. 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
Time shift errors
How to attack a causal conclusion
Assumptions and conditionality: the two types of answer choices normally produced are?
Exceptional case/over generalization
38. 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
Conclusion Identification Method
Assumption Negation Technique
Resolve the Paradox question stem features
Appeal Fallacies
39. Negates both conditions - creating a statement that does not have to be true. Given: A+ --> Study Mistaken Negation: Not A+ --> Not Study
Time shift errors
Justify the conclusion formula
Mistaken Negation
Incorrect Method of Reasoning answers
40. Determine whether the stimulus contains an argument or if it is only a set of factual statements. MUST recognize whether a conclusion is present.
Rules for Family #2
Words used to introduce a necessary condition
Primary Objective #5
Primary Objective #1
41. 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
Assumptions and causality: typical correct answer categories
Premise Indicators
Errors of composition and division
Rules for Family #2
42. Occurs when an author makes conflicting statements. n
Method of Reasoning
Internal contradiction AKA self contradiction
Fundamental rules for strengthen - justify the conclusion and assumption questions
Mistaken cause and effect
43. 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.
2 roles played by assumptions
How to strengthen an argument
Quantity indicators
Numbers and percentages Common misconceptions
44. 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.
Words used to introduce a sufficient condition
the unless equation (conditional reasoning)
LSAT Definition of 'either/or'
Things to remember in regards to WEAKEN questions
45. 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
Primary Objective #8
Straw Man
Rules for Family #3
Conclusion Indicators
46. Separate the answer choices into 'contenders' and 'loser'. After completing this process - review the contenders and decide which answer correct.
Words used to introduce percentage ideas
Things to remember in regards to WEAKEN questions
Primary Objective #8
Time shift errors
47. 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?
Conclusion Indicators
the unless equation (conditional reasoning)
Conclusion definition
Method of Reasoning questions
48. 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
Mistaken Reversal
Straw Man
Resolve the Paradox question stem features
49. 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
Family #1: Prove
Family #4: Disprove
Fact test for Method of Reasoning questions
Main Point Questions
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
Sufficient Condition
General lack of relevant evidence for the conclusion
Conclusion Indicators