What does “a computer learns” mean?

Let’s first start to define:

What is learning?

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I think one could define learning as the acquisition, consciously or unconsciously, of new information or let’s say knowledge about the world, our environment, our routine, the people around us, things we need to know how to do, things we need to remember, in order to reach our goals and adapt to our environment. Learning usually requires an improvement (i.e. an increase) of performances. Continue reading