How were the Gospel writers able to record Jesus' words accurately?
The Gospel writers recorded Jesus' words accurately not by human memory or research, but because the Holy Spirit moved them as they wrote. They did not have to wonder how Jesus said things; every word of the Book was put together by the Spirit's moving, not from notes.
Les explains that critics ridicule the Gospel writers for supposedly asking people to remember word-for-word things Jesus said 10, 15, or even 20 years earlier. Logically, no one could recall all the words of the Sermon on the Mount or the Beatitudes. But the writers did not rely on memory. Les emphasizes that every word of this Book was not picked from somebody's notes and not put together from research. Instead, it was put together as the Holy Spirit moved these writers, so they did not have to stop and wonder how Jesus put this.