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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. Stimulus (affected or determined) ---> answer choices (accepted) AKA: Help Family assumption - justify the conclusion - strengthen/support - resolve the paradox.
Family #2: Help
Rules for Family #2
Sufficient Condition
Primary Objective #6
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
How to identify Justify the Conclusion questions
Primary Objective #6
Central assumption of causal conclusions
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
3. An event or circumstance whose occurrence is required in order for a sufficient condition to occur.
Justify the conclusion formula
Quantity indicators
Necessary Condition
Primary Objective #8
4. Determine whether the stimulus contains an argument or if it is only a set of factual statements. MUST recognize whether a conclusion is present.
3 quirks of assumption question answer choices
One of the most commonly used stimulus structures is what? How are they recognized?
Primary Objective #1
Logical opposites
5. 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
Straw Man
Common weakening scenarios
Assumption Negation Technique
Time shift errors
6. 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
Words used to introduce percentage ideas
Mistaken cause and effect
Appeal Fallacies
Uncertain use of a term or concept
7. Negates both conditions - creating a statement that does not have to be true. Given: A+ --> Study Mistaken Negation: Not A+ --> Not Study
Sufficient Condition
Mistaken Negation
Mistaken cause and effect
Primary Objective #8
8. Occurs when the author uses an analogy that is two disimilar to the original situation to be applicable. n
Primary Objective #5
False analogy
Appeal Fallacies
How to attack a causal conclusion
9. 1. You must accept the stimulus info- even if it contains an error in reasoning-and use it to prove one of the answer choices must be true. 2. Any info in an answer choice that does not appear either directly in the stimulus or as a combination of it
Rules for Family #1
3 incorrect answer traps (weaken)
Primary Objective #6
Family #3: Hurt
10. 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
LSAT Conclusion trick for Method AP questions
2 roles played by assumptions
Words used to introduce a sufficient condition
How to attack a causal conclusion
11. 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
Internal contradiction AKA self contradiction
How to strengthen an argument
Primary Objective #4
One of the most commonly used stimulus structures is what? How are they recognized?
12. 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
Weaken question signal words
Main Point Questions
Words used to introduce a necessary condition
13. 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
Prephrasing Method of Reasoning questions
How to solve Justify questions mechanistically
Probability indicators
One of the most commonly used stimulus structures is what? How are they recognized?
14. An event or circumstance whose occurrence indicates that a necessary condition must also occur.
Rules for Family #2
Sufficient Condition
Errors of composition and division
One of the most commonly used stimulus structures is what? How are they recognized?
15. 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
Mistaken Negation
Logical opposites
Rules for Family #2
LSAT Definition of 'either/or'
16. Occurs when an author improperly equates a percentage with a definate quantity or vice versa. n
Numbers and percentage errors
Mistaken cause and effect
Primary Objective #7
Family #3: Hurt
17. 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
3 incorrect answer traps (weaken)
Counter Premise Indicators
Mistaken Reversal
Incorrect Method of Reasoning answers
18. 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
Weaken question signal words
Solving Parallel Reasoning questions in the order stated
Weakening conditional reasoning
19. 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 quirks of assumption question answer choices
3 logical features of conditional reasoning
Numbers and percentage errors
Causal statements
20. 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
False dilemma
Conclusion Identification Method
Weaken question signal words
How to determine the strength of an argument
21. 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
Family #4: Disprove
Primary Objective #2
False analogy
22. 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
Appeal Fallacies
Primary Objective #7
False dilemma
Circular reasoning
23. Caused by because of responsible for reason for leads to induced by promoted by determined by produced by product of played a role in was a factor in is an effect of.
Assumption Negation Technique
Things to remember in regards to WEAKEN questions
Words used to introduce cause and effect relationships. (memorize)
Rules for Family #3
24. 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 #2
False dilemma
Premise Indicators
Mistaken Negation
25. 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
Internal contradiction AKA self contradiction
Fundamental rules for strengthen - justify the conclusion and assumption questions
Time shift errors
Premise definition
26. Amount - quantity - sum - total - count - tally.n
Weakening conditional reasoning
Probability indicators
Errors of composition and division
Words used to introduce numerical ideas
27. 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
Incorrect Method of Reasoning answers
Primary Objective #5
Straw Man
28. 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
2 roles played by assumptions
Incorrect answers in Point at Issue questions
Words used to introduce numerical ideas
Central assumption of causal conclusions
29. 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
Fact test for Method of Reasoning questions
How to identify Justify the Conclusion questions
Circular reasoning
Assumption Negation Technique
30. 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
Justify the conclusion formula
2 speaker questions
Conclusion definition
Straw Man
31. 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
Mistaken cause and effect
Numbers and percentages Common misconceptions
Family #4: Disprove
What is the biggest reason students miss questions?
32. 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
Central assumption of causal conclusions
Common weakening scenarios
Family #1: Prove
3 quirks of assumption question answer choices
33. 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
Survey errors
Time shift errors
Primary Objective #3
Mistaken Reversal
34. 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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35. 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 Conclusion trick for Method AP questions
How to solve Justify questions mechanistically
Errors of conditional reasoning
Family #1: Prove
36. 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.
Assumptions and causality: typical correct answer categories
Rules for Family #2
What is the biggest reason students miss questions?
Errors in the use of evidence
37. Occurs when an author makes conflicting statements. n
3 incorrect answer traps (weaken)
Weakening conditional reasoning
Mistaken cause and effect
Internal contradiction AKA self contradiction
38. 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
Incorrect Method of Reasoning answers
LSAT Conclusion trick for Method AP questions
Quantity indicators
39. If the stimulus contains an argument - determine whether the argument is strong or weak.
Numbers and percentages Common misconceptions
Primary Objective #3
How to determine the strength of an argument
Resolve the Paradox question stem features
40. Premises + answer choice = conclusion When approaching answers - separate them into winners and losers - then apply the justify formula.
How to solve Justify questions mechanistically
Primary Objective #2
Mistaken cause and effect
Justify the conclusion formula
41. If the stimulus contains an argument - identify the conclusion. If the stimulus contains a fact set - examine each fact.
3 incorrect answer traps (weaken)
Primary Objective #2
Time shift errors
Rules for Family #1
42. 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.
Quantity indicators
Appeal Fallacies
Central assumption of causal conclusions
Method of Reasoning
43. Percent - proportion - fraction - ratio - incidence - likelihood - probability - segment - share. n
Rules for Family #1
Logical opposites
Weakening conditional reasoning
Words used to introduce percentage ideas
44. 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.
Words used to introduce numerical ideas
LSAT Definition of 'either/or'
Common features of Resolve the Paradox
Primary Objective #5
45. 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
General lack of relevant evidence for the conclusion
Justify the conclusion formula
Main Point Questions
Straw Man
46. 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
Survey errors
Logical negation
Conclusion definition
Rules for Family #3
47. 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.
Fact test for Method of Reasoning questions
Logical opposites
How to approach causality and strengthen questions?
Necessary Condition
48. If all 5 answer choices appear to be 'losers' - return to the stimulus and re-evaluate the argument.
Primary Objective #9
Source argument AKA ad hominen
Words used to introduce a sufficient condition
General lack of relevant evidence for the conclusion
49. 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
Resolve the Paradox question stem features
Assumptions and conditionality: the two types of answer choices normally produced are?
Fundamental rules for strengthen - justify the conclusion and assumption questions
Typical assumption question stems
50. 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
False analogy
Primary Objective #4
Typical assumption question stems
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