system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: When a video/text is claimed to have been written by a AI that has been fed thousands of exemplars as models, what's actually happening? How does an AI read or watch exemplars of video or text and then abstract enough meaning from them to make one of its own?
gpt
AI, even really advanced AI, doesn't really deal with "meaning." It's just executing instructions. 

A really basic text generation algorithms works probabilistically. It needs a first word, so it goes through and looks at all the first words in the model text and picks one at random, with more weight given to words that appear more often. Suppose it chooses "the". Then it needs a word that comes after "the", so it goes through and looks at all the words that come after "the" and picks one, and so on. More advanced AI try harder to do things like binding words together into syntactic units or taking into account where in the sentence/paragraph they are.