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LSAT Logical Reasoning Clues

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






2. Think about the structure of the argument before examining the answer choices. Do not expect to see the exact prephrase - there are too many variations. Make an abstract prephrase then examine each answer to see if it paraphrases the prephrase.n






3. 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






4. Occurs when an author makes conflicting statements. n






5. 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






6. 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






7. 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






8. Then - only - only if - must - required - unless - except - until - without.






9. At least on of the two - possibly both.

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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






11. 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






12. Refer to the likelihood of occurence or the obligation present - as in 'The mayor should resign.' 'the law will never pass.' Examples: (do not need to memorize) must - will - always - not always - probably - likely - would - never - rarely - could -






13. 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






14. 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






15. 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






16. 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






17. Thus - therefore - hence - consequently - as a result - so - accordingly - clearly - must be that - shows that - conclude that - follows that - for this reason.






18. 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






19. 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






20. Immediately look for the repeat or contrapositive in the answer choices. Avoid mistaken reversals and mistaken negations.






21. Separate the answer choices into 'contenders' and 'loser'. After completing this process - review the contenders and decide which answer correct.






22. 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?






23. Stimulus (accepted) --/-> answer choices (affected or determined) cannot be true.






24. Amount - quantity - sum - total - count - tally.n






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






26. Weaken - attack - undermine - refute - argue against - call into question - cast doubt - challenge - damage - counter - When evaluating answers ask yourself: 'Would this answer choice make the author reconsider his position or force the author to res






27. Percent - proportion - fraction - ratio - incidence - likelihood - probability - segment - share. n






28. If the stimulus contains an argument - determine whether the argument is strong or weak.






29. 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.






30. 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






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






32. 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






33. Stimulus (affected or determined)--/-> answer choices (accepted) Negative sign on the arrow reflects attacking or hurting the argument (weaken).






34. Occurs when the author uses an analogy that is two disimilar to the original situation to be applicable. n






35. 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.






36. If - when - whenever - every - all - any - people who - in order to.






37. 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






38. 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.






39. 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






40. If the stimulus contains an argument - identify the conclusion. If the stimulus contains a fact set - examine each fact.






41. 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






42. Assumes that only 2 courses of action are available when there may be others. n






43. 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






44. 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+.






45. 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.






46. 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.






47. 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






48. 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






49. 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






50. 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