He forgot his lines all the time and invented new scenes and dialogue on the spot.

Then consider this invented dialogue from a language teaching textbook.

The ingredients - invented dialogue, interpretive casting, manipulative editing, music - demand close scrutiny.

To help tell the story, I have at times invented specific thoughts and dialogue and ascribed them to real people.

There are the by-now standard docudrama tools, extending from necessarily invented dialogue to elliptical references that skim rather than expose.

We are aware that she is inventing dialogue for her characters, but it is informed invention.

Mr. Sheed has often been accused of inventing hilarious dialogue and situations.

"But is it so easy to believe that I have no imagination and I can't invent dialogue or those scenarios?"

But these old hands allow a surprising number of factual errors to infect their story, and they indulge in the irritating habit of inventing dialogue.

However, because the real Boone was a man of few words, Filson invented florid, philosophical dialogue for this "autobiography".