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A robber came into my store ...

A robber came into my store and stole $100 from the register without my knowledge. A few minutes later, the same guy came back with the $100 he stole and purchased $70 worth of items and I gave him $30 in change. How much money did I lose?

Correct answers: 102

The first user who solved this task is Thinh Ddh.

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White hairs

One day, a girl walks to her mother and look at her mother's hair and sadly said: "Why are some of your hair white mom?"

The mother replied, "Well, every time that you do something wrong and make me cry or unhappy, one of my hairs turns white.

The girl thought about this revelation a while, and then said, "Momma, how come *all* of grandma's hairs are white?"

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Thomas S. Kuhn

Born 18 Jul 1922; died 17 Jun 1996 at age 73. Thomas Samuel Kuhn was an American science historian and science philosopher was a MIT professor, noted for his highly influential The Structure of Scientific Revolutions (1962). He held that science was not a steady, cumulative acquisition of knowledge, but it is “a series of peaceful interludes punctuated by intellectually violent revolutions.” Then appears a Lavoisier or an Einstein, often a young scientist not indoctrinated in the accepted theories, to sweep the old paradigm away. Such revolutions, he said, came only after long periods of tradition-bound normal science. He pointed out that scientific research and thought are defined by “paradigms,”or trusted theories, concepts, methods and experiments. Such paradigms are accepted by scientists, who continue to extend, refine, explain and measure results until they meet an problem that cannot be resolved within the established framework. Such anomaly or contradiction eventually requires an intellectual revolution, such as the paradigm shifts from Ptolemaic cosmology to Copernican heliocentrism. “Frameworks must be lived with and explored before they can be broken.”

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