Children discover and verify their theories in quite the same way that scientists do: through experimentation. They manipulate the world and discover regularities of causation from those manipulations. Why do they do it? The discovery of regularities comes with a pleasurable burst of insight, which all of us, but especially children and scientists, continuously long for like bonbons or opium.

— Matthew M. Hurley Daniel C. Dennet Reginald B. Adams

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