The difference between correlation and causation is not just academic—it can have profound policy implications.
To love is to admire with the heart; to admire is to love with the mind.
Technology should solve real problems, not just create new toys.
变得更好的唯一方法就是与最强者对抗。
开放的社会、对知识的无限制获取、人们为推进知识而进行的无计划和无拘束的联合——这些可能使一个庞大、复杂、不断增长、日益专业化和技术化的世界,仍然是一个人类共同体的世界。