For a hundred million users, interacting with the Chat bot was indistinguishable from interacting with a human being. The bot appeared to be able to understand questions and reason out competent answers.  Although its replies were sometimes vapid and sophomoric, that may have made them seem even more convincingly human.

ChatGPT is capable of processing text inputs (prompts and commands) and outputting text whose patterns have a high statistical probability of occurring after such prompts. Its apparent intelligence is a kind of magic trick insofar as the product seems similar to human reason, but it is really high-speed, brute force statistical pattern matching of words in specific contexts. (How human reason works differently will be the subject of a future essay.)