Reply To: 9/11 Building 7 UAF engineering report continued. Latest News › Forums › Discussion Forum › 9/11 Building 7 UAF engineering report continued. › Reply To: 9/11 Building 7 UAF engineering report continued. April 20, 2020 at 09:57 #52162 Clark Paul, how should we know things? I mean, by what method should we determine what is true, and what is false? Is the self enough?