If every effect of any new products or methods were required to be known before they could be produced and marketed, they would not be true innovations - and thus not represent new knowledge of what people would like, if offered.

Edmund Phelps

Edmund Phelps

Any Be True Before Could Effect Every Innovations Knowledge Known Like Methods New New Knowledge Offered People Produced Products Represent Required Thus True Were Would

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The 1920s and 1930s were a period of sensational productivity growth: new products were springing up all over the place, and most of those new products and new methods were developed by people who started their own companies.

— Edmund Phelps

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To know that we know what we know, and to know that we do not know what we do not know, that is true knowledge.

— Nicolaus Copernicus

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Where there is shouting, there is no true knowledge.

— Leonardo da Vinci

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To know what you know and what you do not know, that is true knowledge.

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A true knowledge of ourselves is knowledge of our power.

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