[:en]http://opinionator.blogs.nytimes.com/2015/04/27/reclaiming-the-power-of-play/?_r=1

https://www.reddit.com/r/philosophy/comments/3ffxiz/does_play_produce_knowledge_or_only_refresh_the/
[:BG]http://opinionator.blogs.nytimes.com/2015/04/27/reclaiming-the-power-of-play/?_r=1

Does play produce knowledge or only refresh the cognitive system? Nietzsche, Aristotle, etc. from philosophy

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