A prompt in this context is just the side of the flashcard that prompts you to remember the "other side"/answer. They can be questions, sentences with words mi

A prompt in this context is just the side of the flashcard that prompts you to remember the "other side"/answer. They can be questions, sentences with words missing, or many other things. E.g. for learning a language a prompt could be the English word, prompting you to remember the translation. Gwern calls them "questions" in his article, but "prompt" is more general, given that they're often not phrased as questions. There are many examples of prompts and answers in the main article, with blue backgrounds, and prompts about the article's content with red backgrounds.