另外一些常见的学习类型不是被设计用于为输入创建分类，而是作出决定；它们统称决策问题。

The other common type of learning is designed not to create classifications of inputs, but to make decisions; these are called decision problems.

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同样地，当你的大脑从真实世界的传感器上获取持续的输入时，大脑迅速学习将它映射到一种第六感中。

Similarly, when you're brain gets consistent input from a real-world sensor, it quickly learns to map that into a sort-of six sense.

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如果通过算法作出的决定需要输入别的地方，这时分类学习是必要的。

Classification learning is often necessary when the decisions made by the algorithm will be required as input somewhere else.

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