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Category Archives: Mathematics and Logic
“Just say no”: Does chastity work?
The recent amazing discovery that teens like sex has led to campaigns promoting chastity among high school students. Advocates for this crusade condemn the promotion of condom use, claiming that avoidance of sex is the only way to prevent unwanted … Continue reading
Posted in Crank science, Education, Science and Medicine, Statistics
Tagged chastity, condom, effectiveness, efficacy, pledge, sex, teens
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Do you believe in evolution?
The author and aphorist G.K. Chesterton once wrote “When people stop believing in God they don’t believe in nothing, they believe in anything.” Did you like that? If so, beware. It’s a human failing to mistake glibness for insight, and … Continue reading
Posted in Atheism and Religion, Education, Logic, Mathematics and Logic, Quotes, Religion
Tagged atheism, belief, Euclid, evolution, G.K. Chesterton, god, Logic
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Which countries are research giants?
On its news website, the journal Nature recently published a graphic illustrating scientific research activity around the world as measured by the number of papers published from January to October 2011. Nature obligingly arranged the data by country. A glance … Continue reading
WISE Math vs WNCP: Why your kids can’t do math.
“Would you like your children taught to read by a teacher who could read only at the Grade Five level?” That question (I paraphrased it) comes from Anna Stokke, a University of Winnipeg professor who teaches future teachers how to … Continue reading
Posted in Education, Mathematics and Logic, Statistics
Tagged arithmetic, elementary education, mathematics learning, WISE Math, WNCP
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Splitting the Restaurant Bill
The problem Alice and Brian go out to lunch. Brian drinks only water with his sandwich, but Alice has a glass of wine and a more expensive sandwich. After the meal, Alice leaves her credit card on the table and … Continue reading
Posted in Etiquette, Mathematics and Logic, Puzzles
Tagged algebra, debt, lunch, payment, restaurant bill
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Five Regular Solids, Part Three
Parts One and Two of this series of blogs established the following facts about solids that have F flat faces, E straight edges and V vertices. 1. The second fact concerns those solids that are regular. By regular we mean … Continue reading
Posted in Geometry, Mathematics and Logic
Tagged cube, dodecahedron, icosahedron, mathematics, octahedron, polyhedra, regular solids, tetrahedron
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Five Regular Solids, Part Two
We have counted the number of faces (F), the number of vertices (V) and the number of edges (E) on five regular solids. These solids are regular because the number of edges bounding each face (m) is the same for … Continue reading
Posted in Geometry, Mathematics and Logic
Tagged cube, dodecahedron, icosahedron, mathematics, octahedron, polyhedra, regular solids, tetrahedron
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