It's not random at its core. It's a neural network picking the most statistically likely words to come next based on the previous content. Where the randomnes

It's not random at its core. It's a neural network picking the most statistically likely words to come next based on the previous content. Where the randomness does come in is that it will sometimes randomly not pick the most statistically likely output, but maybe the second, or third, or seventh most statistically likely. This keeps it from getting stuck in a rut and just repeating itself endlessly, although you can still see it do that behavior to some degree.