A science is said to be useful if its development tends to accentuate the existing inequalities in the distribution of wealth, or more directly promotes the destruction of human life.
G. H. Hardy (英國著名數學家)中文翻譯哈代的名言: 如果一門科學的發展傾向於加劇現有的財富分配不平等,或者更直接地促進人類生命的毀滅,那麼它就被認為是有用的。