Didn't even notice that part. Training is definitely the wrong word to use. Checked out the Reddit thread and the screenshot of the conversation where it came up and it seems like total bullshit.

The person talking sends an image showing the character name at 2:44am and then between the two of them there are 8 more lines in that same minute, including the dev saying that the descriptions are bullshit. So we're supposed to think dude read several paragraphs of text and then him and his buddy sent those 7 other messages back and forth all within the same minute the image arrived?

I'm a big reader and type quickly, but that's not at all realistic. After all of that in one minute, only one more single minute passes before the dev sends a cropped screenshot showing that same name and saying it was the only place he'd ever typed it. So he got in to Google Docs and got the right document open to the right place then snapped and pasted the image in one minute.

And... the "proof" image that starts everything and is supposedly from a conversation with an AI doesn't show the interface at all. All we see is bulleted lists. That could be word, or it could be another screenshot from Google Docs. Nothing in any of it shows any AI interface saying anything.

Seems like a weak attempt at getting publicity for his game, which of course he links to the sales page for.