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The world is not run from where he thinks. Not from castle walls, but from countinghouses, not by the call of the bugle but by the click of the abacus, not by the grate and click of the broadsword but by the scrape of the pen.

In computer science, we often deal with problems that are easy to state but hard to solve.

我努力寫一些誠實且貼近生活的書。