Test your logic skills. A Ten-Minute Mystery.
Last night, Sir Gibbsley’s prized possession, his Tribal Tooth Mask, disappeared. Can you help him find it? Sir Gibbsley used to hunt elephants in Africa till a rogue elephant took out his right leg. Now he loves to terrify his nephew Horatio with fearsome tales of the Serengeti. [...]

Have you seen Isaac Watts’ logic book? Watts is mostly known for his hymns but he also wrote Logic, or The Right Use of Reason in the Inquiry After Truth With a Variety of Rules to Guard Against Error in the Affairs of Religion and Human Life, as well as in the Sciences. Logic was [...]

I came on your site by accident and was surprised to see some very interesting books here. I am very interested in the children’s books for critical thinking and logic. The only problem is that I live in the Netherlands and my kids speak dutch only (for now). My question to you is, are there [...]

Myers Family reviews the new edition of The Fallacy Detective

Last night, Sir Gibbsley’s prized possession, his Tribal Tooth Mask, disappeared. Can you help him find it? Sir Gibbsley used to hunt elephants in Africa till a rogue elephant took out his right leg. Now he loves to terrify his nephew Horatio with fearsome tales of the Serengeti. Use your critical thinking skills to find [...]

by Andrew C. Thomas, Opinion Editor for The Tech, the M.I.T. student newspaper
I’m always delighted when two sides that seem mutually opposed come together in harmonious agreement. I’m even more delighted when I’ve taken one of those sides.
In this case, I write of the efforts of Nathaniel and Hans Bluedorn, brothers from Iowa who advocate [...]

I am new to visiting your site and I read with great interest your article on the Sabbath in the correspondence section for your web site. At the end of the article you invited comments detecting flaws in your logic. My question to you is this: How sure are you that Jesus, who was a [...]

Pepsi has a billboard up in my state reading, “Hey Washington, more people prefer the taste of Pepsi!” Clearly, the fallacy here is “ad POPulum.”
Did you catch the other ‘fallacy’? The sentence… isn’t. It does not express a complete thought. “More people”? More people than WHAT? More people than horses? More people than frogs? More [...]

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Just use your head!
Nathaniel Bluedorn

Toby asks…..
We have used some of your logic texts but have encountered an informal argument we thought may be a fallacy not covered in the books. We name it after the kid who uses it.
A certain camper wore the same t-shirt all week. When my Dear Husband, his counselor, told him on Thursday to change [...]