Einstein on The Essential Feature of Productive Thought http://t.co/jei3lYrO0L via @farnamstreet
— The ModularWorld* (@TheModularWorld) April 25, 2014
Einstein on The Essential Feature of Productive Thought http://t.co/jei3lYrO0L via @farnamstreet
— The ModularWorld* (@TheModularWorld) April 25, 2014
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