Presentation 6 (Genuineness of Assent) is online. It appears that Google Docs may have changed the appearance when you click on the link, however, it works the same. Once you click on the link, you will reach the page asking for a log-in. You do not have to log in though. Instead, simply click on the link that says “View published presentation in a new window.” You can then view the presentation normally.
Sorry for the confusion.