Khan Academy
Khan Academy: Fallacies: Appeal to the People
In this video, Jordan MacKenzie discusses a type of informal fallacy known as the argumentum ad populum fallacy, or the appeal to the people fallacy. This fallacy occurs when one attempts to establish the truth of a conclusion by...
Khan Academy
Khan Academy: Fallacies: Affirming the Consequent
In this video, Matthew C. Harris explains the fallacy of affirming the consequent, the formal fallacy that arises from inferring the converse of an argument. [3:25]
Khan Academy
Khan Academy: Fundamentals: Abductive Arguments
In this video, Geoff Pynn follows up on his introduction to critical thinking by exploring how abductive arguments give us reason to believe their conclusions. Good abductive arguments don't guarantee their conclusions, but give us very...
Khan Academy
Khan Academy: Fallacies: Straw Man Fallacy
In this Wireless Philosophy video, Joseph Wu (University of Cambridge) introduces you to the straw man fallacy. This fallacy is committed whenever someone misrepresents an opponent's claim in arguing against it. [5:58]
Khan Academy
Khan Academy: Fallacies: Slippery Slope
In this Wireless Philosophy video, Joseph Wu (University of Cambridge) introduces you to the slippery slope argument. This argument is that when one event occurs, other related events will follow, and this slippery slope will eventually...
Khan Academy
Khan Academy: Fallacies: Red Herring
In this Wireless Philosophy video, Joseph Wu (University of Cambridge) introduces you to the red herring, a rhetorical device, and the fallacy that is often difficult to spot. A red herring occurs when something is introduced to an...
Khan Academy
Khan Academy: Fallacies: Post Hoc Ergo Propter Hoc
In this video, Paul explains the post-hoc-ergo-propter-hoc fallacy. This is an informal fallacy committed when a person reasons that because one event happened after another event, the first event caused the second. [5:41]
Khan Academy
Khan Academy: Fallacies: Equivocation
Joseph Wu (University of Cambridge) explains the fallacy of equivocation, the fallacy that occurs when the same term is used with different meanings in an argument. [6:29]
Khan Academy
Khan Academy: Fallacies: Fallacy of Division
In this video, Paul Henne describes the fallacy of division, the informal fallacy that arises when we assume that the parts of some whole must have the same properties as the whole they make up. [4:51]
Khan Academy
Khan Academy: Fallacies: Formal and Informal Fallacies
In this video, Paul describes the distinction between formal and informal fallacies.
Sophia Learning
Sophia: Cpctc: Lesson 1
This lesson [8:19] will demonstrate the use of CPCTC in triangle congruency proofs. It is 1 of 4 in the series titled "CPCTC."
Khan Academy
Khan Academy: Brain Teasers: Forehead Numbers Brain Teaser
The perfect logicians are at it again.
Khan Academy
Khan Academy: Brain Teasers: Blue Forehead Room Brain Teaser
What happens when 100 perfect logicians have to figure out if they each have a blue forehead?
Sophia Learning
Sophia: Conditional, Contrapositive, Inverse, Converse, Biconditional
Students learn about the terms related to logic and conditional statements. Terms explored are conditional, contrapositive, inverse, converse, and biconditional.
Khan Academy
Khan Academy: Brain Teasers: Alien Abduction Brain Teaser
Saving Earth from becoming a mushroom farm.
Khan Academy
Khan Academy: Cognitive Biases: The Gi Joe Fallacy
In this video, Laurie Santos (Yale University) discusses why knowing about our cognitive biases is not enough to overcome them. She'll introduce a new cognitive error known as the G.I. Joe Fallacy, the tendency for our biases to stick...
Khan Academy
Khan Academy: Fundamentals: Implicit Premise
In this video, Kelley will go over how to identify implicit premises in all sorts of arguments and discuss when it is and is not acceptable to leave a premise implicit. [3:04]
Khan Academy
Khan Academy: Writing: Logical Comparison Basic Example
Watch David work through an SAT Writing logical comparison question. [3:59]
Khan Academy
Khan Academy: Sufficient Assumptions Worked Example
In this video [5:55] watch a demonstration of one way to approach a sufficient assumption question. It is a worked example.
Khan Academy
Khan Academy: Sufficient Assumptions Video Lesson
In this video [9:55] watch one way to approach a question that asks you to identify a sufficient assumption on the logical reasoning section of the LSAT.
Sophia Learning
Sophia: Counterexamples: Lesson 2
This lesson will help a learner understand counterexamples. It is 2 of 7 in the series titled "Counterexamples." [1:43]
Sophia Learning
Sophia: Counterexamples: Lesson 5
This lesson will help a learner understand counterexamples. It is 5 of 7 in the series titled "Counterexamples." [3:49]
Sophia Learning
Sophia: Using Deductive Logic: Lesson 11
This lesson demonstrates the use of a process of elimination in order to solve a problem. It is 11 of 13 in the series titled "Using Deductive Logic."
Sophia Learning
Sophia: Using Deductive Logic
This lesson demonstrates the use of a process of elimination in order to solve a problem.