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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. 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
How to determine the strength of an argument
Family #2: Help
Primary Objective #4
2. 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
Prephrasing Method of Reasoning questions
Assumptions and causality: typical correct answer categories
How to identify Justify the Conclusion questions
3. 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.
Family #2: Help
General lack of relevant evidence for the conclusion
Logical opposites
Numbers and percentage errors
4. Stimulus (affected or determined) ---> answer choices (accepted) AKA: Help Family assumption - justify the conclusion - strengthen/support - resolve the paradox.
Family #1: Prove
2 roles played by assumptions
Family #2: Help
Central assumption of causal conclusions
5. 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
Sufficient Condition
3 logical features of conditional reasoning
Justify the conclusion formula
Method of Reasoning
6. 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
How to determine the strength of an argument
2 roles played by assumptions
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
Circular reasoning
7. 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.
Family #1: Prove
Fundamental rules for strengthen - justify the conclusion and assumption questions
Mistaken cause and effect
False analogy
8. 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
What is the biggest reason students miss questions?
Numbers and percentages Common misconceptions
Appeal Fallacies
Numbers and percentage errors
9. 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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10. 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 definition
Conclusion Identification Method
Incorrect Method of Reasoning answers
Quantity indicators
11. Amount - quantity - sum - total - count - tally.n
Errors of composition and division
Words used to introduce a necessary condition
Primary Objective #1
Words used to introduce numerical ideas
12. 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
Weaken question signal words
Justify the conclusion formula
Logical opposites
Solving Parallel Reasoning questions in the order stated
13. 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.
Conclusion definition
Family #3: Hurt
What is the biggest reason students miss questions?
Central assumption of causal conclusions
14. Authors misuses info to such a degree that they fail to provide any info to support their conclusion or they provide info that is irrelevant to their conclusion. n
How to determine the strength of an argument
Sufficient Condition
General lack of relevant evidence for the conclusion
Prephrasing Method of Reasoning questions
15. 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
3 logical features of conditional reasoning
2 roles played by assumptions
Common features of Resolve the Paradox
16. 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
Errors of conditional reasoning
Circular reasoning
Incorrect answers in Point at Issue questions
How to strengthen an argument
17. 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
Uncertain use of a term or concept
Weakening conditional reasoning
3 quirks of assumption question answer choices
Rules for Family #1
18. 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
Method of Reasoning questions
Primary Objective #4
How to approach causality and strengthen questions?
Errors of conditional reasoning
19. 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
Numbers and percentages Common misconceptions
Method of Reasoning questions
Words used to introduce percentage ideas
General lack of relevant evidence for the conclusion
20. Carefully read and identify the question stem. DO NOT assume that certain words are automatically associated with certain questions types.
Common weakening scenarios
One of the most commonly used stimulus structures is what? How are they recognized?
Errors of composition and division
Primary Objective #5
21. An event or circumstance whose occurrence indicates that a necessary condition must also occur.
Things to remember in regards to WEAKEN questions
Words used to introduce cause and effect relationships. (memorize)
How to attack a causal conclusion
Sufficient Condition
22. 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
Rules for Family #2
Fact test for Method of Reasoning questions
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
Errors in the use of evidence
23. 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
Sufficient Condition
Rules for Family #3
Exceptional case/over generalization
Uncertain use of a term or concept
24. 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
Uncertain use of a term or concept
Central assumption of causal conclusions
Conclusion Indicators
Mistaken Negation
25. 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
Counter Premise Indicators
Logical negation
Mistaken Negation
26. 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.
Primary Objective #3
Weaken question signal words
Words used to introduce numerical ideas
Premise Indicators
27. 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
Uncertain use of a term or concept
Source argument AKA ad hominen
Internal contradiction AKA self contradiction
28. 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
What is the biggest reason students miss questions?
Method of Reasoning
Assumption Negation Technique
Rules for Family #2
29. At least on of the two - possibly both.
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30. 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.
3 quirks of assumption question answer choices
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
Source argument AKA ad hominen
the unless equation (conditional reasoning)
31. Percent - proportion - fraction - ratio - incidence - likelihood - probability - segment - share. n
Words used to introduce percentage ideas
Logical negation
Mistaken Reversal
Words used to introduce numerical ideas
32. 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
How to approach causality and strengthen questions?
Weakening conditional reasoning
Errors of composition and division
Incorrect answers in Point at Issue questions
33. 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
Primary Objective #1
Errors of conditional reasoning
Numbers and percentage errors
34. 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
Central assumption of causal conclusions
Errors of conditional reasoning
Exceptional case/over generalization
Rules for Family #1
35. 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
Appeal Fallacies
Typical assumption question stems
Errors in the use of evidence
Common weakening scenarios
36. 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 #4
Words used to introduce numerical ideas
Primary Objective #2
Numbers and percentages Common misconceptions
37. 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
Typical assumption question stems
Logical negation
How to solve Justify questions mechanistically
Logical opposites
38. 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
What is the biggest reason students miss questions?
3 quirks of assumption question answer choices
One of the most commonly used stimulus structures is what? How are they recognized?
39. 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
Sufficient Condition
Straw Man
Incorrect answers in Point at Issue questions
40. 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+.
Source argument AKA ad hominen
Mistaken Reversal
Conclusion Identification Method
LSAT Conclusion trick for Method AP questions
41. 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
Exceptional case/over generalization
Assumptions and causality: typical correct answer categories
Family #3: Hurt
Errors of conditional reasoning
42. 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
Mistaken cause and effect
How to attack a causal conclusion
Errors of conditional reasoning
False dilemma
43. 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
Conclusion Indicators
3 incorrect answer traps (weaken)
Circular reasoning
Numbers and percentage errors
44. 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
Time shift errors
False analogy
'Additional' Premise Indicators
Typical assumption question stems
45. 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
3 logical features of conditional reasoning
Necessary Condition
Justify the conclusion formula
Circular reasoning
46. Prephrase: after reading the question stem - take a moment to mentally formulate your answer to the question stem.
Assumption Negation Technique
Primary Objective #6
Uncertain use of a term or concept
Primary Objective #9
47. Assumes that only 2 courses of action are available when there may be others. n
Family #2: Help
Causal statements
Conclusion Identification Method
False dilemma
48. 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
Family #2: Help
Justify the conclusion formula
Circular reasoning
Family #3: Hurt
49. An event or circumstance whose occurrence is required in order for a sufficient condition to occur.
Exceptional case/over generalization
Necessary Condition
Assumptions and conditionality: the two types of answer choices normally produced are?
Numbers and percentage errors
50. Stimulus (accepted) --/-> answer choices (affected or determined) cannot be true.
Mistaken Reversal
Family #4: Disprove
How to solve Justify questions mechanistically
How to determine the strength of an argument