Does it make up answers?

No. It retrieves information from your own material and links to the source. If it does not find an answer, it says so.

Technically, it is based on searching for the correct paragraphs from your documents and formulating the answer based on them. The model is not allowed to answer freely from its own memory.

Each answer shows where it comes from, so the user can go to the source and verify. This also means that an error can be traced to a document and corrected there, instead of someone having to guess what the system was thinking.