Yes. It’s trained on completing the text. If an expert write a long test and you and "in summary: " at the end, the model will complete with something approxi

Yes. It’s trained on completing the text. If an expert write a long test and you and "in summary: " at the end, the model will complete with something approximating truth (depend on size of model, training, etc) Humains do a similar things. We have a model in our head of the subject discussed and we can summarize, but we will forget some parts, make errors, etc. GPT is very similar.