In fact, my program crashes because I end up trying to divide by zero, a really bad thing. Hint: if you implement Newton's method, do not make your first guess zero.

我下一步都没法开始,实际上，我的程序会崩溃，因为我试着去除0了，真糟糕,提示你：如果你想用牛顿的方法，第一个猜想数别设为0。

麻省理工公开课 - 计算机科学及编程导论课程节选

The alternative is the Bayesian method, in which you simply guess at the answer and then continue to collect data as it comes in.

FORBES: Strategy at Digital Speed

This does not mean, of course, that net migration has not fallen, just that, according to some experts, the government's main method of measuring its progress is little better than a rough guess.

BBC: The truth behind UK migration figures