"Identify the hypothesis and conclusion of the following statement, and determine whether the statement is always, sometimes, or never true." In this video, Sal Khan offers an introduction to understanding mathematical logic statements. (03:53)

In this video, Sal Khan continues discussing inductive reasoning using a harder number pattern to help the viewer understand how to understand and solve the word problem. (02:21)

Sal Khan continues his discussion using the same statement as the last video in this series, but adds a different logic problem to solve: "Identify the hypothesis and conclusion of the following statement, and determine whether the statement is alway...s, sometimes, or never true." In this video, Sal offers an introduction to understanding mathematical logic statements. (06:43)[more]

"Determine whether the statement is always, sometimes, or never true, and explain why." Sal Khan takes a mathematical statement and helps the viewer make sense out it. (03:12)

"Determine whether the statement is always, sometimes, or never true, and explain why." Sal Khan continues with this logic statement and works step-by-step through it. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education. (01:49)

In this video, Sal Khan uses toothpicks and houses to solve this logic problem.The viewer may wish to open the video to 'full screen' as there is a lot of writing on a small black screen. (06:35)

Using the fundamentals of set theory, explore the mind-bending concept of the “infinity of infinities” -- and how it led mathematicians to conclude that math itself contains unanswerable tquestions. (07:13)

In a conversational tone, Sal Khan offers an ending commentary to his series about mathematical logic statements. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education. (03:28)

In this video, Sal Khan looks at a girl's reasoning when she conjectures that an algebraic expression equals another (simpler) algebraic expression. He explains that her reasoning does not involve inductive reasoning and therefore is not a conjecture.... It is in fact a proof. (02:07)[more]

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