The PowerScore
LSAT Logical Reasoning
Bible Course

Fortify your Logical Reasoning skillset with on demand video lessons taught by our experts, Dave Killoran and Jon Denning.

Subscribe for $19.99/month
(Requires the PowerScore Testing & Analytics Package)

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Course Features

The course includes over 30 hours of on demand Logical Reasoning lectures, available when you want, where you want. Every concept is explained in a series of short, easy-to-follow videos, giving you the tools you need for complete LR dominance. You also receive detailed Question and Drill Explanations, fully deconstructing every LSAT question in the PowerScore Logical Reasoning Bible.

View Syllabus

Dave literally wrote the book on Logical Reasoning, and Jon is one of the world's foremost LSAT experts. They have decades of experience helping LSAT students, and are widely regarded as the industry's premier LSAT instructors.

For additional support, you'll have access to the dedicated Logical Reasoning Bible Course section of our LSAT Forum, giving you a chance to interact with instructors, other students, and even the course authors in a dynamic, collaborative environment.

Course Preview: Errors in the Use of Evidence — General Lack

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Course Preview: Errors in the Use of Evidence — General Lack

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MONTHLY ANALYTICS
SUBSCRIPTION*

$19.99 per month
(two month minimum)

+ The PowerScore LSAT Logical Reasoning Bible Course

$19.99 per month

1 YEAR OF
ANALYTICS ACCESS

$69.99
(flat rate)

+ The PowerScore LSAT Logical Reasoning Bible Course

$19.99 per month

MONTHLY ANALYTICS
SUBSCRIPTION*

$19.99 per month
(two month minimum)

+ The PowerScore LSAT Logical Reasoning Bible Course

$19.99 per month

+ LSAT Prep Plus

($99 flat rate)

1 YEAR OF
ANALYTICS ACCESS

$69.99
(flat rate)

+ The PowerScore LSAT Logical Reasoning Bible Course

$19.99 per month

+ LSAT Prep Plus

($99 flat rate)

*There is a 2 month minimum subscription required to get started with the Testing & Analytics Package ($19.99/month). If choosing one of the Analytics monthly subscription options, your initial payment of $59.97 for the first 2 months of Testing & Analytics subscription plus one month of LRB Course access will be charged to you today. After 30 days, you will be charged $19.99 for your second month of LRB Course access. Your third month of access to the Testing & Analytics Package plus the LRB Course, and all consecutive 30 day periods thereafter, will receive a charge of $39.98. You can cancel your subscriptions at any time! An active LSAT Prep Plus subscription is required, and you can add that to your order in the bottom row of purchase options with a flat $99 fee if you don't have it yet.

If you purchase one of the options containing a full year of Analytics access, you will pay a one-time fee of $69.99 for the Testing & Analytics Package, and be charged a monthly fee of $19.99 for each 30 day period of access to the LSAT Logical Reasoning Bible Course. You can cancel your LRB Course subscription at any time! An active LSAT Prep Plus subscription is required, and you can add that to your order in the bottom row of purchase options with a flat $99 fee if you don't have it yet.

Frequently Asked Questions

The Logical Reasoning Bible is not necessary to take advantage of the LRB course, but it does help! The course explores the concepts and questions covered in the book, using videos to comprehensively deconstruct what the book offers in written form. But the book does contain elements that are not covered in the course. So the course and the book are complementary tools, both of which can serve as standalone prep resources but whose value is maximized when used together.

Yes! Not only is the video format of the course a powerful new way to learn Logical Reasoning, but the course also expands upon the various ideas and explanations in the LRB with extended discussions of both the concepts and the questions. You will discover that the course videos frequently delve deeper into the book's talking points, while the book itself presents content not included as part of the course's core curriculum.

The Logical Reasoning Bible course features 135 real questions drawn from previously released LSATs, each with a comprehensive video explanation. The course also contains a multitude of additional drills and exercises to reinforce critical knowledge!

While the Logical Reasoning Bible course has you fully covered in terms of strategies and techniques, continued practice is an essential part of the learning process! Coupling the course with our Analytics package allows us to show you real LSAT questions and allows you to immediately apply the course methodology to every available piece of LSAT content in existence, all offered in an intuitively organized platform for maximum efficiency and long-term retention. Our Analytics platform also provides detailed performance feedback that will help guide your progress and fine-tune your priorities as you continue to navigate through the course videos.

Our In Person, Live Online, and On Demand courses are designed to be fully-immersive prep experiences covering every last aspect of the LSAT in concert with every practice test and question available, delivered in a highly-structured environment. They were engineered as a one-stop shop for anyone looking to improve their LSAT score, with detailed feedback and personalized coaching from first practice test to official test day. Each of these courses also includes its own Online Student Center with lesson-specific homework and explanations and dozens of hours of additional virtual modules covering everything from specific concepts to test mentality.

The Logical Reasoning Bible course is far more focused in scope, with an aim to helping students who prefer to prepare for LR in a self-paced, self-guided fashion. Whether you're an LR novice in need of top-to-bottom aid, or a seasoned pro looking for clarity on a final handful of concepts, the customizable nature of our Logical Reasoning Bible course puts you in complete control of your LSAT journey.

Because of these fundamental differences, students find that the various course types ultimately work exceptionally well together, whether completed simultaneously or in succession! Thus the LRB video course can serve as an independent prep resource, an incredibly impactful starting point leading into a live course, a final post-course score booster in the weeks before test day, or a natural companion piece completed alongside another course to supercharge your in-class growth.

The short answer is that they primarily differ in what they emphasize. The Logical Reasoning Bible course is an exhaustive examination of every key LR element, building from the most fundamental to the most challenging and complex. As such, it will teach you how to effectively approach all of the Logical Reasoning question types and properly deconstruct any argument presented.

The Advanced LR course specifically targets only the most challenging LR questions and concepts to have ever appeared on the LSAT. It is meant for high-achieving students looking for step-by-step explanations of the most difficult LSAT scenarios a test taker could encounter, not those in need of a comprehensive presentation of the entire PowerScore Logical Reasoning system.

Yes! We are currently working on those courses, and hope to make the Logic Games course available for purchase in the spring and Reading Comprehension in the summer.

Syllabus

  • How LSAT Studying is Different From Regular Studying —   1:59
  • A Note About Timing —   1:25
  • The Section Directions —   3:34
  • The Parts of a Logical Reasoning Question —   2:05
  • Approaching the Questions What To Read First? —   6:32
  • Arguments versus Fact Sets —   5:27
  • Identifying Premises and Conclusions —   7:52
  • One Confusing Indicator Form —   3:17
  • Premise and Conclusion Recognition Mini-Drill
    • Premise and Conclusion Recognition Mini-Drill #1 —   0:51
    • Premise and Conclusion Recognition Mini-Drill #2 —  0:46
    • Premise and Conclusion Recognition Mini-Drill #3 —  0:29
    • Premise and Conclusion Recognition Mini-Drill #4 —  1:04
    • Premise and Conclusion Recognition Mini-Drill #5 —  1:18
    • Premise and Conclusion Recognition Mini-Drill #6 —  1:23
  • Additional Premise Indicators —   2:41
  • Counter-Premise Indicators —   4:50
  • Additional Premise and Counter-Premise Recognition Mini-Drill
    • Additional Premise and Counter-Premise Recognition Mini-Drill #1 —   2:57
    • Additional Premise and Counter-Premise Recognition Mini-Drill #2 —   2:53
    • Additional Premise and Counter-Premise Recognition Mini-Drill #3 —   2:18
  • Recognizing Conclusions Without Indicators —   6:41
  • Complex Arguments —   6:02
  • A Commonly Used Construction —   5:04
  • Summarizing Stimuli —   17:07
  • Killer Sentences —   16:22
  • Reference Words —   3:36
  • Reference Substitution —   4:05
  • Argument Analysis —   6:19
  • Read the Fine Print —   6:02
  • Analyzing the Question Stem —   1:07
  • The Thirteen Logical Reasoning Question Types —   13:26
  • Most in Question Stems —   3:29
  • Except and Least in Question Stems —   6:04
  • Prephrasing Answers —   3:48
  • The Answer Choices —   10:00
  • Must Be True Questions —   7:14
  • Most Strongly Supported Questions —   3:44
    • Must Be True: Flavonoids —   6:22
  • Returning to the Stimulus —   1:54
  • New Information and the Idea Umbrella™ —   5:09
    • Must Be True: Ozone Layer —   9:03
  • Correct Answers in Must Be True and Most Strongly Supported Questions Reviewed —   1:02
  • Incorrect Answers in Must Be True and Most Strongly Supported Questions —   6:20
  • Idea Application: An Analysis of Correct and Incorrect Answers
    • Must Be True: Rolling Pins —   7:31
    • Must Be True: Multiauthored Articles —   8:52
    • Must Be True: Environmental Exploitation —   8:15
  • Must Be True and Most Strongly Supported Question Problem Set
    • Must Be True: Function of Laws —   9:04
    • Must Be True: Newtonian Physics —   4:56
    • Must Be True: Bridge Pier Pilings —   8:32
    • Must Be True: Moral Theory —   5:52
    • Must Be True: Mystery Stories —   10:08
    • Must Be True: Cezanne —   7:02
    • Must Be True: Rhodopsin —   9:28
    • Must Be True: Historical Sources —   8:27
  • Main Point Questions —   3:42
  • Two Incorrect Answer Types —   1:24
    • Main Point: Government Censorship —   6:15
    • Main Point: Hogan's Actions —   7:01
  • Main Point — Fill in the Blank Questions —   2:47
    • Main Point: Language Acquisition —   7:24
  • Main Point Question Problem Set
    • OCF —   4:12
    • Prediction —   6:06
  • Sufficient and Necessary Conditions —   9:50
  • To Diagram or Not to Diagram —   2:21
  • Three Logical Features of Conditional Reasoning —   5:14
  • Valid and Invalid Statements —   13:32
  • Conditional Argument Structure —   2:59
  • Symbolic Representation and Diagramming Negatives —   6:05
  • The Multiplicity of Indicator Words —   5:04
  • How to Recognize Conditionality —   5:29
  • The Unless Equation™ —   7:50
  • Conditional Reasoning and Must Be True/Most Strongly Supported Problems
    • Must Be True: Financial Problems —   9:02
    • Must Be True: Endosymbiosis —   13:20
  • Conditional Linkage —   3:04
    • Must Be True: Keyboard Skills —   7:54
    • Must Be True: Earth's Axis —   12:22
  • Diagramming Either/Or Statements —   5:42
  • Multiple Sufficient and Necessary Conditions —   4:36
  • The Double Arrow —   5:48
  • The Double-Not Arrow —   5:02
  • Don't Force Conditionality On Every Problem —   3:53
  • Sufficient and Necessary Question Problem Set
    • Must Be True: Economic Growth —   6:58
    • Must Be True: Driving Demerits —   9:25
    • Main Point: Muscular Strength —   5:35
    • Must Be True: Musical Performances —   9:30
    • Must Be True: Politician Scandal —   5:02
    • Must Be True: Leachate —   7:10
  • Weaken Questions —   8:37
  • How to Weaken an Argument —   7:34
  • Three Incorrect Answer Traps —   3:50
  • Weaken Questions Analyzed
    • Weaken: Detective Carl —   5:44
    • Weaken: Plastic Rings —   11:13
    • Weaken: Carpet Market —   10:03
  • Weakening Conditional Reasoning —   2:23
    • Weaken: Responsibility Law —   10:31
    • Weaken: High Tax —   10:24
  • Weaken Question Problem Set
    • Weaken: Human Faculties —   6:30
    • Weaken: Loggerhead Turtles —   10:20
    • Weaken: Specialized Knowledge —   5:15
    • Weaken: Synesthesiacs —   13:26
    • Weaken: Eurasian Settlers —   10:23
    • Weaken: Lobster Diseases —   8:49
  • What is Causality? —   5:43
  • How to Recognize Basic Causality —   3:27
  • The Difference Between Causality and Conditionality —   3:59
  • Causality in the Conclusion versus Causality in the Premises —   3:16
  • Situations That Can Lead to Errors of Causality —   3:36
  • The Central Assumption of Basic Causal Conclusions —   5:09
  • How to Attack a Basic Causal Conclusion —   4:50
  • Diagramming Causality —   2:52
  • A Basic Cause and Effect Problem Analyzed
    • Causality: High School Dropouts —   9:27
  • An Advanced Cause and Effect Problem Analyzed
    • Causality: Meerkat Sentinels —   13:44
  • Causal Reasoning Problem Set
    • Causality: Anticollision Device —   8:01
    • Causality: Antidepressant Weight Gain —   7:44
    • Causality: Violent Crime Calls —   8:25
  • The Second Family —   4:58
  • The Difference Between Strengthen, Justify the Conclusion, and Assumption Questions —   12:35
  • Strengthen Questions —   3:44
  • How to Strengthen an Argument —   3:08
  • Strengthen Questions Analyzed
    • Strengthen: Gem World —   8:23
    • Strengthen: Financial Magazine —   9:55
  • Basic Causality and Strengthen Questions —   4:20
    • Strengthen: Modern Navigation Systems —   9:33
    • Strengthen: Declining Amphibian Populations —   13:30
  • Strengthen Question Problem Set
    • Strengthen: Continental Drift —   9:09
    • Strengthen: Sleep Deprivation —   7:12
    • Strengthen: MBTE —   10:31
    • Strengthen: Galanin —   10:01
  • Justify the Conclusion Questions (Sufficient Assumptions) —   12:08
  • The Justify Formula™ —   7:59
  • Why are Justify Questions Described in Terms of Sufficiency? —   5:01
  • Justify the Conclusion Stimuli —   9:58
    • Justify: Sailboat Race —   8:03
  • Solving Justify Questions: The Mechanistic Approach™ —   12:53
    • Justify: Forgone Pleasures —   9:16
  • Test Maker Tricks: Justify the Conclusion Questions —   7:18
  • Justify the Conclusion — Fill in the Blank Questions —   3:45
  • Justify the Conclusion Question Problem Set
    • Justify: Visceral Emotion —   6:11
    • Justify: Marian Anderson —   7:13
    • Justify: Experts —   8:16
    • Justify: Vague Laws —   8:23
  • Assumption Questions (Necessary Assumptions) —   9:16
  • Assumption Question Stems —   5:35
  • The Supporter/Defender Assumption Model™ —   18:36
    • Assumption: Funding Art —   13:11
  • The Assumption Negation Technique™ —   10:08
  • Negating Statements —   4:36
  • Logical Opposition —   15:48
  • Negating Conditional Statements —   3:50
  • Assumptions and Conditionality —   5:05
    • Assumption: Automobile Emissions —   14:22
  • Assumptions and Causality
    • Assumption: Tinted Glasses —   13:20
  • Flawed Assumption Questions —   3:13
  • Resolve the Paradox Questions —   4:20
  • Question Stem Features —   2:14
  • Active Resolution —   2:02
    • Resolve the Paradox: Accident Rates —   10:31
  • Address the Facts —   2:00
    • Resolve the Paradox: Excess Calories —   10:31
  • Resolve the Paradox Question Problem Set
    • Resolve the Paradox: Safety Training —   8:16
    • Resolve the Paradox: Cigarette Nicotine —   8:30
    • Resolve the Paradox: Raisins —   10:46
    • Resolve the Paradox: Vervet Monkeys —   5:59
  • Formal Logic Defined —   6:03
  • Formal Logic Terms and Diagrams Defined —   12:05
  • Formal Logic Relationship Indicators Defined Numerically —   7:02
  • The Rules of Reversibility —   5:18
  • The Special Case of Some are Not —   2:56
  • Inherent versus Additive Inferences —   6:30
  • The Logic Ladder™ —   5:18
  • Two Rules of Diagram Creation —   6:43
  • The 11 Principles of Making Formal Logic Inferences
    • The 11 Principles of Making Formal Logic Inferences Intro —   3:00
    • The 11 Principles of Making Formal Logic Inferences #1 —   1:20
    • The 11 Principles of Making Formal Logic Inferences #2 —   1:16
    • The 11 Principles of Making Formal Logic Inferences #3 —   1:19
    • The 11 Principles of Making Formal Logic Inferences #4 —   6:57
    • The 11 Principles of Making Formal Logic Inferences #5 —   3:07
    • The 11 Principles of Making Formal Logic Inferences #6 —   2:04
    • The 11 Principles of Making Formal Logic Inferences #7 —   5:30
    • The 11 Principles of Making Formal Logic Inferences #8 —   2:40
    • The 11 Principles of Making Formal Logic Inferences #9 —   2:58
    • The 11 Principles of Making Formal Logic Inferences #10 —   7:28
    • The 11 Principles of Making Formal Logic Inferences #11 —   3:53
  • Some Train Diagramming Mini-Drill
    • Some Train Diagramming Mini-Drill #1 —   1:19
    • Some Train Diagramming Mini-Drill #2 —   1:30
    • Some Train Diagramming Mini-Drill #3 —   1:08
    • Some Train Diagramming Mini-Drill #4 —   1:21
    • Some Train Diagramming Mini-Drill #5 —   1:04
    • Some Train Diagramming Mini-Drill #6 —   1:47
    • Some Train Diagramming Mini-Drill #7 —   1:28
    • Some Train Diagramming Mini-Drill #8 —   0:57
  • Most Train Diagramming Mini-Drill
    • Most Train Diagramming Mini-Drill #1 —   0:50
    • Most Train Diagramming Mini-Drill #2 —   1:12
    • Most Train Diagramming Mini-Drill #3 —   1:24
    • Most Train Diagramming Mini-Drill #4 —   1:01
    • Most Train Diagramming Mini-Drill #5 —   1:09
    • Most Train Diagramming Mini-Drill #6 —   1:39
    • Most Train Diagramming Mini-Drill #7 —   1:22
    • Most Train Diagramming Mini-Drill #8 —   1:12
  • Additive Inference Drill
    • Formal Logic Additive Inference Drill #1 —   5:00
    • Formal Logic Additive Inference Drill #2 —   4:57
    • Formal Logic Additive Inference Drill #3 —   4:12
    • Formal Logic Additive Inference Drill #4 —   6:23
    • Formal Logic Additive Inference Drill #5 —   4:32
    • Formal Logic Additive Inference Drill #6 —   5:12
  • Formal Logic Problem Set
    • Must Be True-FL: Political Parties —   11:52
    • Must Be TrueX-FL: Cats —   9:48
    • Must Be True-FL: Students —   10:09
    • Justify-FL: Tracheophytes —   16:54
  • Method of Reasoning Questions —   3:32
  • The Fact Test in Method of Reasoning Questions —   1:50
  • Incorrect Answers in Method of Reasoning Questions —   5:18
  • Idea Application: Correct and Incorrect Answers Analyzed
    • Method: Garbage Collection —   11:33
    • Method: Guitar Ideas —   9:08
  • Method of Reasoning-Argument Part Questions —   4:13
  • Method AP Stimulus Structure
    • Method-AP: Responses to Words —   8:00
    • Method-AP: Gratitude —   6:45
  • A Common Wrong Answer —   2:19
  • Method of Reasoning Problem Set
    • Method: 1960s Rock —   4:30
    • Method: Halley's Comet —   9:13
    • Method-AP: Sea Temperature —   5:15
    • Method-AP: Human Diet —   8:22
    • Method: Rock Music —   3:30
    • Method-AP: Pedigreed Dogs —   9:37
  • Flaw in the Reasoning Questions —   3:10
  • The Value of Knowing Common Errors of Reasoning —   3:37
  • Errors in the Use of Evidence
    • General Lack —   8:13
    • Internal Contradiction —   5:19
    • Overgeneralization —   4:04
    • Force —   12:00
  • Source Argument —   3:54
  • Circular Reasoning —   4:01
  • Errors of Conditional Reasoning —   4:22
  • Mistaken Cause and Effect —   8:18
  • Straw Man —   4:57
  • Appeal Fallacies —   11:34
  • Survey Errors —   10:10
  • Errors of Composition and Division —   5:40
  • Uncertain Use of a Term or Concept —   4:25
  • False Analogy —   3:36
  • False Dilemma —   4:32
  • Time Shift Errors —   2:29
  • Relativity Flaw —   5:11
  • Flaw in the Reasoning Question Problem Set
    • Flaw: Premier's Advisor —   6:22
    • Flaw: Cotrell —   5:26
    • Flaw: Irradiated Food —   8:51
    • Flaw: Scientific Community —   6:23
    • Flaw: Offensive Movies —   5:50
    • Flaw: Hillview Smog —   8:54
    • Flaw: Moon Cratering —   5:23
    • Flaw: Good Health —   7:21
  • Parallel Reasoning Questions —   3:18
  • Parallel Flaw Questions —   2:26
  • Solving Parallel Reasoning Questions —   29:14
    • Parallel Flaw: Littering —   6:36
    • Parallel Flaw: Drackedary —   9:00
    • Parallel: Professor Alban —   12:33
    • Parallel: Tax Avoidance —   7:23
  • Parallel Reasoning Question Problem Set
    • Parallel Flaw: Miriam —   6:10
    • Parallel Flaw: Education Quality —   7:35
    • Parallel Flaw: Hallstown Groceries —   8:12
    • Parallel Flaw: Bank Deposits —   8:32
  • Numbers and Percentages Principles —   12:01
  • Numbers and Percentages Indicators —   2:56
  • Number and Percentages Misconceptions —   13:56
    • #%: Energy Use —   11:31
    • #%: Obese Children —   10:45
    • #%: Plastic Waste —   12:26
    • #%: Chefs' Union —   8:04
  • Markets and Market Share —   8:32
    • #%: Automobile-Industry Revenues —   10:13
  • Numbers and Percentages Problem Set
    • #%: Ditrama —   10:27
    • #%: Markland —   14:59
  • Evaluate the Argument Questions —   5:57
  • The Variance Test™ —   10:43
    • Evaluate: Bolter's Trimmer —   8:43
  • Evaluate the Argument Question Problem Set
    • Evaluate: 1984 —   9:12
    • Evaluate: Thinking Machines —   7:10
  • Cannot Be True Questions —   6:16
  • The All vs Part Conflict —   4:10
  • Cannot Be True Question Problem Set
    • Cannot: Immoral Actions —   12:15
  • Point at Issue Questions —   3:53
  • Incorrect Answers in Point at Issue Questions —   6:49
  • The Agree/Disagree Test™ —   3:45
    • PI: Art Ownership —   7:12
    • PI: Tropical Oils —   7:50
  • Point of Agreement Questions —   2:00
  • The Agree/Agree Test™ —   1:51
  • Point at Issue Question Problem Set
    • PI: Order Processing —   7:05
    • PI: Electricity Rates —   7:20
    • PI: Sports Celebrities —   4:53
    • PI: Contemporary Art —   7:54
  • Principle Questions —   3:21
  • Principles Defined and Applied —   6:29
    • Principle: Truthful Statements —   13:05
    • Principle: Experimentation on Animals —   11:05