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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. 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
Logical negation
Circular reasoning
the unless equation (conditional reasoning)
LSAT Conclusion trick for Method AP questions
2. An event or circumstance whose occurrence is required in order for a sufficient condition to occur.
the unless equation (conditional reasoning)
Typical assumption question stems
Method of Reasoning
Necessary Condition
3. 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.
Common features of Resolve the Paradox
Rules for Family #2
Exceptional case/over generalization
Counter Premise Indicators
4. 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
Fundamental rules for strengthen - justify the conclusion and assumption questions
What is the biggest reason students miss questions?
Logical opposites
5. 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
3 incorrect answer traps (weaken)
the unless equation (conditional reasoning)
Words used to introduce percentage ideas
Prephrasing Method of Reasoning questions
6. If the stimulus contains an argument - identify the conclusion. If the stimulus contains a fact set - examine each fact.
Primary Objective #9
Primary Objective #8
LSAT Conclusion trick for Method AP questions
Primary Objective #2
7. 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
Rules for Family #3
Causal statements
Primary Objective #2
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
8. 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
Mistaken cause and effect
3 logical features of conditional reasoning
Assumption Negation Technique
Numbers and percentage errors
9. 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
Sufficient Condition
Method of Reasoning
Appeal Fallacies
How to approach causality and strengthen questions?
10. 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
Logical negation
Errors of conditional reasoning
Mistaken cause and effect
How to attack a causal conclusion
11. Thus - therefore - hence - consequently - as a result - so - accordingly - clearly - must be that - shows that - conclude that - follows that - for this reason.
2 speaker questions
Rules for Family #3
Conclusion Indicators
Assumptions and causality: typical correct answer categories
12. Occurs when the author uses an analogy that is two disimilar to the original situation to be applicable. n
Primary Objective #1
Fundamental rules for strengthen - justify the conclusion and assumption questions
False analogy
Primary Objective #3
13. A fact - proposition or statement from which a conclusion is made. Ask: What reasons has the author used to persuade me? Why should I believe this argument? What evidence exists?
3 logical features of conditional reasoning
Numbers and percentage errors
Premise definition
the unless equation (conditional reasoning)
14. Stimulus (affected or determined) ---> answer choices (accepted) AKA: Help Family assumption - justify the conclusion - strengthen/support - resolve the paradox.
Rules for Family #2
Family #1: Prove
Logical negation
Family #2: Help
15. Stimulus (affected or determined)--/-> answer choices (accepted) Negative sign on the arrow reflects attacking or hurting the argument (weaken).
How to strengthen an argument
Family #3: Hurt
Mistaken cause and effect
Assumption Negation Technique
16. 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
Common features of Resolve the Paradox
How to solve Justify questions mechanistically
How to attack a causal conclusion
Conclusion Indicators
17. 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.
Rules for Family #1
Family #1: Prove
the unless equation (conditional reasoning)
How to identify Justify the Conclusion questions
18. 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+.
Conclusion Indicators
Mistaken Reversal
Weakening conditional reasoning
Method of Reasoning
19. Amount - quantity - sum - total - count - tally.n
Words used to introduce numerical ideas
Words used to introduce a sufficient condition
Probability indicators
How to determine the strength of an argument
20. 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
Fundamental rules for strengthen - justify the conclusion and assumption questions
Numbers and percentages Common misconceptions
Logical negation
Premise Indicators
21. 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
Straw Man
Things to remember in regards to WEAKEN questions
Typical assumption question stems
Assumptions and conditionality: the two types of answer choices normally produced are?
22. 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
Weaken question signal words
Method of Reasoning questions
Primary Objective #4
How to attack a causal conclusion
23. 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
Premise definition
Rules for Family #3
Primary Objective #9
24. 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
Primary Objective #8
Errors of composition and division
Conclusion Identification Method
Time shift errors
25. 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.
Logical opposites
Assumption Negation Technique
What is the biggest reason students miss questions?
How to approach causality and strengthen questions?
26. Determine whether the stimulus contains an argument or if it is only a set of factual statements. MUST recognize whether a conclusion is present.
Uncertain use of a term or concept
Primary Objective #1
Words used to introduce a necessary condition
Sufficient Condition
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
Conclusion definition
Words used to introduce numerical ideas
Fact test for Method of Reasoning questions
28. 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
Conclusion Indicators
Mistaken Reversal
Method of Reasoning
29. 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
Time shift errors
How to identify Justify the Conclusion questions
False dilemma
Errors of composition and division
30. An event or circumstance whose occurrence indicates that a necessary condition must also occur.
Sufficient Condition
How to attack a causal conclusion
Straw Man
Primary Objective #3
31. Read closely and know precisely what the author said. DO NOT GENERALIZE!.
Primary Objective #4
Premise definition
Family #3: Hurt
Method of Reasoning questions
32. 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
Causal statements
How to attack a causal conclusion
Fundamental rules for strengthen - justify the conclusion and assumption questions
Prephrasing Method of Reasoning questions
33. 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.
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
Resolve the Paradox question stem features
How to determine the strength of an argument
Assumptions and conditionality: the two types of answer choices normally produced are?
34. Stimulus (accepted) --/-> answer choices (affected or determined) cannot be true.
Justify the conclusion formula
'Additional' Premise Indicators
What is the biggest reason students miss questions?
Family #4: Disprove
35. 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
2 speaker questions
Method of Reasoning
Assumptions and causality: typical correct answer categories
Solving Parallel Reasoning questions in the order stated
36. Assumes that only 2 courses of action are available when there may be others. n
False dilemma
Source argument AKA ad hominen
Words used to introduce percentage ideas
LSAT Definition of 'either/or'
37. Premises + answer choice = conclusion When approaching answers - separate them into winners and losers - then apply the justify formula.
Common weakening scenarios
Justify the conclusion formula
Words used to introduce a sufficient condition
Primary Objective #5
38. 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
Primary Objective #7
How to identify Justify the Conclusion questions
Method of Reasoning questions
Justify the conclusion formula
39. Percent - proportion - fraction - ratio - incidence - likelihood - probability - segment - share. n
Primary Objective #5
Words used to introduce percentage ideas
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
Fact test for Method of Reasoning questions
40. To raise a viewpoint at the beginning of the stimulus and then disagree with it immediately thereafter. The stimulus often begins with: Some people claim... Some people propose... Many people believe... Some argue that... Some critics claim... Some s
Fundamental rules for strengthen - justify the conclusion and assumption questions
How to strengthen an argument
One of the most commonly used stimulus structures is what? How are they recognized?
2 speaker questions
41. 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 Negation
Common weakening scenarios
Primary Objective #8
Errors in the use of evidence
42. Occurs when an author improperly equates a percentage with a definate quantity or vice versa. n
Rules for Family #2
How to attack a causal conclusion
Rules for Family #1
Numbers and percentage errors
43. 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
How to attack a causal conclusion
Logical negation
Uncertain use of a term or concept
2 speaker questions
44. 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
Conclusion Identification Method
2 speaker questions
Mistaken cause and effect
the unless equation (conditional reasoning)
45. Separate the answer choices into 'contenders' and 'loser'. After completing this process - review the contenders and decide which answer correct.
Primary Objective #1
Mistaken Negation
Premise definition
Primary Objective #8
46. At least on of the two - possibly both.
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47. 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
Prephrasing Method of Reasoning questions
Method of Reasoning
Errors in the use of evidence
48. 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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49. 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
3 quirks of assumption question answer choices
Counter Premise Indicators
How to solve Justify questions mechanistically
Primary Objective #5
50. 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
Numbers and percentage errors
Uncertain use of a term or concept
Incorrect Method of Reasoning answers
Common weakening scenarios