Ready to introduce the study of logic with what has been called "the hardest logic puzzle in the world"? What better way than with a TED-Ed video! This video describes the famous green-eyed-prisoners-on-an-island riddle by first posing...

Challenge your students to explain why this interesting mathematical law works! Sal, accompanied by Vi Hart, demonstrates BenfordÕs Law. They challenge the listeners to see if they can intuitively explain why this law fairly accurately...

Challenge your students to explain why this interesting mathematical law works! Sal, accompanied by Vi Hart, demonstrates BenfordÕs Law. They challenge the listeners to see if they can give an intuitive reason why this law fairly...

In this video, Sinan Dogramaci (The University of Texas at Austin) explains the puzzle of grue. He discusses how this puzzle undercut the attempt to formally develop inductive logic, the logic of probabilistic support.

Everybody has false beliefs, including you. But that means everyone's beliefs are self-contradictory. If we wrote down everything you believe in a book, we'd have to include one more statement in the book's preface: 'some of the...