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NoticeI am no longer posting new puzzles to this blog. For all of my Sudoku puzzles, old and new, please visit Sudoku in another section of this website. I will still create and offer new puzzles, in batches of a couple of hundred, once a week or so. Sudoku #18Category: Sudoku Today is the 80th anniversary of the start of the trial of John Scopes in Dayton, Tennessee, for the "crime" of teaching evolution. Scopes was found guilty 11 days later. It wasn't until 1968 that laws outlawing the teaching of evolution were overturned by the US Supreme Court. But even now, there are still groups opposed to the teaching of evolution, blaming it for all sorts of evils in the modern world. Some try to diminish it by calling it "just a theory". But that reflects a profound lack of understanding of what evolution is. What many people don't realize about evolution is that it's not a theory. Theories involving evolution include Darwin's natural selection and more recent theories like punctuated equilibrium. But evolution is not a theory, it's the observation. Scientists ever since Darwin have observed that species change. They change over time and over distance. Evolution has been observed in nature, in the laboratory, and in the fossil record. It is simply one of the most important principles underlying the biological sciences today. Science works through a process of logical analysis. Likewise, when solving a Sudoku puzzle, you must proceed in a systematic manner from what you already know, eliminating possibilities that cannot possibly be true, to get closer and closer to the ultimate truth. Hans
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