One way to encourage people to investigate 9/11 is to prove to them that government officials are lying. One cannot prove the controlled demolitions in a matter of seconds, but the lying is much easier- especially if we use their own words and contradictory statements to prove that they are lying.
Exhibit 1: Condoleeza Rice to the 9/11 Commission about the August 6th Memo Bush received while on vacation in Texas: "I believe the title was Bin Laden Determined to Attack Inside the United States" 
[1]
Exhibit 2: Condoleeza Rice describing her reaction: "... my first thought was, what a terrible accident." [2]
Exhibit 3: Bush: "my first thought was, there's one terrible pilot..." [3]
The obvious question is: Why did the President and National Security Advisor both think it was a terrible accident when they had recently received a memo titled "Bin Laden Determined to Attack Inside the United States"
Either they are incompetent or lying- period. There is no other explanation.