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在数学中,提出问题的艺术必须比解决问题更有价值。
In mathematics, the art of proposing a question must be held of higher value than solving it.
所有的枪都上了膛。
Mental phenomena are best understood in terms of their functions.
真正的创造力来自限制,而不是无限的可能性。
The truth is rarely pure and never simple.