Category Archives: davidbdale

Snow Day Attendance

Posted on February 12, 2019 by davidbdale

Good News I was encouraged to see that eight of my students logged on to our Counterintuitivity blog during yesterday’s snow cancellation, left good Notes on the MON FEB 11 Agenda, and followed through with very thoughtful responses to the Tasks … Continue reading →

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Barter Explained, Poorly

Posted on February 11, 2019 by davidbdale

Paragraph 1. Bartering is trading services or goods with another person when there is no money involved. This type of exchange was relied upon by early civilizations. There are even cultures within modern society who still rely on this type … Continue reading →

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The “Give Directly” Hypothesis

Posted on February 11, 2019 by davidbdale

In 2013 Daniel Handel, an economist with USAID—the U.S. government’s main agency for foreign assistance—had just moved to Rwanda when he heard about a charity that was testing a bold idea: Instead of giving people in poor countries, say, livestock … Continue reading →

Posted in davidbdale, Test a Hypothesis | 30 Comments

Counterintuitivity

Posted on February 4, 2019 by davidbdale

Counterintuitive Thinking In case I forget to ask you later, somewhere in your Notes today, please tell me what specific example in the lecture provided you with the clearest understanding of what I mean by counterintuitive, and why. Before we begin … Continue reading →

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Card Hypothesis

Posted on February 4, 2019 by davidbdale

FACT: Each card has a number on one side and a letter on the other.HYPOTHESIS: Every card that has a vowel on one side has an even number on its opposite side.THE TEST: Which card or cards must you turn … Continue reading →

Posted in davidbdale, Riddles | 19 Comments

Apple’s “Face Palm” Bug

Posted on January 30, 2019 by davidbdale

Apple Was Slow to Act on FaceTime Bug That Allows Spying on iPhones By Nicole Perlroth SAN FRANCISCO — On Jan. 19, Grant Thompson, a 14-year-old in Arizona, made an unexpected discovery: Using FaceTime, Apple’s video chatting software, he could eavesdrop … Continue reading →

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Task: Purposeful Summaries

Posted on January 29, 2019 by davidbdale

The Purposeful Summary Task You’ll be writing Purposeful Summaries of three counterintuitive articles as discussed in today’s Purposeful Summary Lecture. Links to dozens of candidate articles can be found in the sidebar of the blog. You may make use of … Continue reading →

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Africans and Americans

Posted on January 25, 2019 by davidbdale

Riddle: Find the African-American

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My Hypothesis—davidbdale

Posted on January 22, 2019 by davidbdale

My Hypothesis—davidbdale concussions in football concussions and helmet design in NFL football the effect of improved helmet design on the number of concussions suffered by players in NFL games Helmet designs that act like shock absorbers to reduce the impact … Continue reading →

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Task: Safer Saws

Posted on January 26, 2012 by davidbdale

Exultant InventorTwelve years ago an avid home woodworker invented an ingenious device that stops a table saw blade within 4/1000ths of a second of contact with human flesh. The technology could prevent thousands of amputations every year in the United … Continue reading →

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