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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. 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
How to strengthen an argument
Fundamental rules for strengthen - justify the conclusion and assumption questions
How to approach causality and strengthen questions?
3 quirks of assumption question answer choices
2. Stimulus (accepted) --/-> answer choices (affected or determined) cannot be true.
Primary Objective #3
Family #4: Disprove
Errors of composition and division
Straw Man
3. If - when - whenever - every - all - any - people who - in order to.
Words used to introduce a sufficient condition
Method of Reasoning
Time shift errors
3 logical features of conditional reasoning
4. 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
Conclusion Indicators
Rules for Family #1
Justify the conclusion formula
False dilemma
5. Negates both conditions - creating a statement that does not have to be true. Given: A+ --> Study Mistaken Negation: Not A+ --> Not Study
Assumption Negation Technique
Typical assumption question stems
Mistaken Negation
Primary Objective #2
6. Occurs when the author uses an analogy that is two disimilar to the original situation to be applicable. n
False dilemma
Conclusion definition
False analogy
Rules for Family #1
7. 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
How to attack a causal conclusion
Primary Objective #8
Words used to introduce a sufficient condition
Errors of conditional reasoning
8. 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
Primary Objective #1
LSAT Definition of 'either/or'
Counter Premise Indicators
3 logical features of conditional reasoning
9. 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
Family #4: Disprove
Fundamental rules for strengthen - justify the conclusion and assumption questions
3 incorrect answer traps (weaken)
Appeal Fallacies
10. 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?
Fundamental rules for strengthen - justify the conclusion and assumption questions
Probability indicators
Mistaken cause and effect
11. 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
Errors in the use of evidence
Conclusion Identification Method
Primary Objective #8
What is the biggest reason students miss questions?
12. Determine whether the stimulus contains an argument or if it is only a set of factual statements. MUST recognize whether a conclusion is present.
How to attack a causal conclusion
Primary Objective #1
Rules for Family #2
3 incorrect answer traps (weaken)
13. 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?
Quantity indicators
Conclusion definition
Family #4: Disprove
False dilemma
14. 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
How to strengthen an argument
Causal statements
Numbers and percentages Common misconceptions
Resolve the Paradox question stem features
15. Read closely and know precisely what the author said. DO NOT GENERALIZE!.
Words used to introduce a sufficient condition
Primary Objective #4
Mistaken cause and effect
Main Point Questions
16. At least on of the two - possibly both.
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17. 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
What is the biggest reason students miss questions?
Conclusion Indicators
2 roles played by assumptions
Justify the conclusion formula
18. 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
Uncertain use of a term or concept
Causal statements
Rules for Family #1
How to identify Justify the Conclusion questions
19. An event or circumstance whose occurrence is required in order for a sufficient condition to occur.
Errors in the use of evidence
Necessary Condition
Words used to introduce a sufficient condition
Primary Objective #6
20. 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
Mistaken cause and effect
Family #2: Help
Uncertain use of a term or concept
Typical assumption question stems
21. 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
3 incorrect answer traps (weaken)
Errors in the use of evidence
Justify the conclusion formula
Common features of Resolve the Paradox
22. 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 incorrect answer traps (weaken)
3 logical features of conditional reasoning
Assumptions and conditionality: the two types of answer choices normally produced are?
Circular reasoning
23. 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
False dilemma
Rules for Family #2
Conclusion Identification Method
Survey errors
24. If all 5 answer choices appear to be 'losers' - return to the stimulus and re-evaluate the argument.
How to determine the strength of an argument
Words used to introduce percentage ideas
Words used to introduce a sufficient condition
Primary Objective #9
25. An event or circumstance whose occurrence indicates that a necessary condition must also occur.
Sufficient Condition
Family #4: Disprove
Errors in the use of evidence
Rules for Family #2
26. 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
Mistaken Negation
Source argument AKA ad hominen
Primary Objective #3
27. 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
Rules for Family #3
Numbers and percentages Common misconceptions
Solving Parallel Reasoning questions in the order stated
Logical opposites
28. 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
Primary Objective #3
Rules for Family #3
Circular reasoning
Errors of conditional reasoning
29. 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
Primary Objective #2
Typical assumption question stems
2 speaker questions
Mistaken cause and effect
30. Then - only - only if - must - required - unless - except - until - without.
Words used to introduce a necessary condition
Assumption Negation Technique
3 quirks of assumption question answer choices
Primary Objective #6
31. 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
Assumptions and conditionality: the two types of answer choices normally produced are?
How to solve Justify questions mechanistically
Rules for Family #1
How to approach causality and strengthen questions?
32. 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
Words used to introduce numerical ideas
Conclusion Indicators
Mistaken Negation
Fact test for Method of Reasoning questions
33. 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
Resolve the Paradox question stem features
Rules for Family #2
LSAT Conclusion trick for Method AP questions
Circular reasoning
34. To logically negate a conditional statement - negate the necessary condition. Example: neither...nor becomes either...or.
3 logical features of conditional reasoning
Solving Parallel Reasoning questions in the order stated
Rules for Family #3
Logical negation
35. 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.
Words used to introduce cause and effect relationships. (memorize)
What is the biggest reason students miss questions?
Rules for Family #2
General lack of relevant evidence for the conclusion
36. Carefully read and identify the question stem. DO NOT assume that certain words are automatically associated with certain questions types.
Primary Objective #5
Internal contradiction AKA self contradiction
Solving Parallel Reasoning questions in the order stated
Words used to introduce numerical ideas
37. 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
General lack of relevant evidence for the conclusion
Weakening conditional reasoning
Primary Objective #4
38. Separate the answer choices into 'contenders' and 'loser'. After completing this process - review the contenders and decide which answer correct.
Primary Objective #3
Quantity indicators
Weaken question signal words
Primary Objective #8
39. 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)
Errors in the use of evidence
Conclusion definition
Necessary Condition
40. Prephrase: after reading the question stem - take a moment to mentally formulate your answer to the question stem.
Primary Objective #6
LSAT Definition of 'either/or'
Assumptions and causality: typical correct answer categories
Family #2: Help
41. Stimulus (affected or determined) ---> answer choices (accepted) AKA: Help Family assumption - justify the conclusion - strengthen/support - resolve the paradox.
Time shift errors
Family #2: Help
Uncertain use of a term or concept
Conclusion Indicators
42. Premises + answer choice = conclusion When approaching answers - separate them into winners and losers - then apply the justify formula.
Logical opposites
Primary Objective #4
Uncertain use of a term or concept
Justify the conclusion formula
43. 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
Primary Objective #2
Errors of conditional reasoning
Numbers and percentages Common misconceptions
Assumptions and conditionality: the two types of answer choices normally produced are?
44. 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
3 quirks of assumption question answer choices
Solving Parallel Reasoning questions in the order stated
Assumption Negation Technique
Family #1: Prove
45. 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
Assumption Negation Technique
Solving Parallel Reasoning questions in the order stated
One of the most commonly used stimulus structures is what? How are they recognized?
How to solve Justify questions mechanistically
46. 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.
Numbers and percentages Common misconceptions
Internal contradiction AKA self contradiction
Weaken question signal words
Strengthen questions ask you to identify the answer choice that best supports the argument. 2 common features
47. 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
Main Point Questions
Time shift errors
'Additional' Premise Indicators
Incorrect Method of Reasoning answers
48. 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
Rules for Family #2
How to approach causality and strengthen questions?
False dilemma
Errors of composition and division
49. Thus - therefore - hence - consequently - as a result - so - accordingly - clearly - must be that - shows that - conclude that - follows that - for this reason.
General lack of relevant evidence for the conclusion
How to strengthen an argument
Assumptions and conditionality: the two types of answer choices normally produced are?
Conclusion Indicators
50. 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
Numbers and percentages Common misconceptions
3 quirks of assumption question answer choices
What to do when a stimulus that contains conditional reasoning is combined with a must be true question stem
One of the most commonly used stimulus structures is what? How are they recognized?