If you look at the 2nd to last page of the PDF you can see Tim Schafer's deception where he hadn't actually designed the ending puzzle by the time the document was due.

> We didn’t have the last puzzle designed when I wrote that document, so I wrote two nonsense paragraphs and then overlapped them in the file so it would look like the final puzzle description was in there, but obscured by a print formatting error. That way I could turn the document in by the deadline.