People often treat ChatGPT and its peers like private assistants — but when you type, upload, or speak sensitive material into a chatbot, you may be handing away control of that information in ways most users don’t expect. The short list published by mainstream outlets — identity documents, medical results, bank and investment details, login credentials, and proprietary corporate material — is accurate as a starting point, but the full picture is more complex. This feature unpacks the five...