It hasn't. It's memorised the examples and can generate them with some variation and according to what output is more likely given the input. But that's generat

It hasn't. It's memorised the examples and can generate them with some variation and according to what output is more likely given the input. But that's generation, not computation. I don't know if this example helps, but a computer can generate (pseudo-)random numbers by executing an algorithm. A pair of dice can also generate random numbers because they're thrown so that they land at random and someone has marked pips on their faces that a human can read as numbers. The result may be similar, but one is generated by a computation and the other by a random process. The random process is not a computation. It's a random process. (Or just unpredictable).