confabulation

noun3

1. •
   A fabricated memory believed to be true, especially in someone with dementia or with encephalopathy from advanced alcoholism.

   • Segal said another characteristic of Trump’s questionable mental acuity is confabulation. “It’s where he takes an idea or something that’s happened and he adds to it things that have not happened.” — 2025
2. •
   An assertion, statement, or text generated by a generative AI that is presented by that AI as if it were true but is in fact a made-up, false notion.
3. •
   A casual conversation; a chat.

   • […] Mrs Grantly was preparing herself for a grand attack which she was to make on her father, as agreed upon between herself and her husband during their curtain confabulation of that morning. — 1855