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The safest way to double your money is to fold it over once and put it in your pocket.

The only true wisdom is in knowing you know nothing.

La palabra es el arma más poderosa que tenemos, porque con ella podemos cambiar el mundo.

The sun is our most powerful tool in Africa. We must learn to work with it, not against it.

因果模型是數據與決策之間的橋梁。