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Gutsmuths.—Many of the ideas in PHome are better expressed, though independently arrived at, in the remarkable volume on play, published by Gutsmuths, ‘the father of play in Germany,’ towards the end of the eighteenth century. Gutsmuths recognised the universality of play among all ages and all peoples, the infinite…
Imagine you are faced with the following challenge: You must discover the underlying structure of an immense system that contains tens of thousands of pieces, all generated by combining a small set of elements in various ways. These pieces, in turn, can be combined in an infinite number of ways, although only a subset…
Mrs. Lee creates five decks of cards to structure her assessment—each deck has two cards more than the total number of students (to increase variability). The cards in Deck 1 have the name of a 20th century poet who was not the subject of an in-class discussion. The cards in Deck 2 each feature a poetic theme (e.g…
In a multidimensional set of interrelations among tests, one axis can be found that accounts for as much of the interrelatedness as possible, even when it is known that more dimensions are required. The g-men have defined that largest dimension as g. They haven’t discovered it, as they are fond of saying, any more…
The other way was if you do various kinds of mumbo-jumbo then this great agent in the sky will come down and give you eternal life, in which case you could have an infinite number of sports cars. And so Pascal’s wager: either you believe in God or you don’t; if there is no God it can’t do any harm to believe in him…
A spider trap (or crawler trap) is a set of web pages that may intentionally or unintentionally be used to cause a web crawler or search bot to make an infinite number of requests or cause a poorly constructed crawler to crash. Web crawlers are also called web spiders, from which the name is derived. Spider traps may…
A fossil hunter needs sharp eyes and a keen search image, a mental template that subconsciously evaluates everything he sees in his search for telltale clues. A kind of mental radar works even if he isn't concentrating hard. A fossil mollusk expert has a mollusk search image. A fossil antelope expert has an antelope…
Look round the world, contemplate the whole and every part of it: you will find it to be nothing but one great machine, subdivided into an infinite number of lesser machines, which again admit of subdivisions to a degree beyond what human senses and faculties can trace and explain. All these various machines, and even…
Here we go again, one of the epic documents of our time, the Hubble Ultra Deep Field (UDF) photograph, the deepest look into space ever. A random part of the sky, so small it could be covered by a pinhead held at arm's length. A part of the sky -- as NASA says -- that you'd see looking through an eight-foot-long soda…
Feynman's graphical method provides a way of visualizing each term in the sum over histories. Those pictures, called Feynman diagrams, are one of the most important tools of modern physics. In QED the sum over all possible histories can be represented as a sum over Feynman diagrams like those below, which represent…
It would be desirable for the government to authorize people to go into the factories and shops, to see the craftsmen at their work, to question them, to draw the tools, the machines, and even the premises. There are special circumstances when craftsmen are so secretive about their techniques that the shortest way of…