The authors contend that conspiracy theorists suffer from "cognitive blunders" and "crippled epistemology". Using psycho-philosophic parlance they are saying those failing to accept the official story of the 9/11 Commission, leading members of which admitted it was "set up to fail", cannot think straight. But the "theorists/extremists" they wish to censure include by now thousands of physicists, architects and engineers using only physical facts and data; substantial figures in theology and philosophy applying elementary logic; military, political and intelligence personnel from all over the world with lifetimes of experience in how the system -- including its underbelly -- functions.
So, what is proposed? "Practically speaking", the authors write, "government might do well to maintain a more vigorous counter-disinformation establishment." (pg 19) They recommend that government officials respond "to more rather than fewer conspiracy theories [which] has a kind of synergy benefit: it reduces the legitimating effect of responding to any one of them, because it dilutes the contrast with unrebutted theories." (pgs 15, 29) Such advice assumes that all theories -- or aspects of a single theory -- are essentially equal in validity or lack of validity -- an odd position for legal minds supposedly sensitive to fine distinctions. But that would not matter when the point is simply to defeat citizen efforts.
More menacing, however is that the authors suggest "planting doubts [to] undermine the crippled epistemology [through] cognitive infiltration" of groups by governmental agents or by forces appointed by government. (pgs 3, 14, 15, 22, 29)"Government agents (and their allies)", they write, "might enter chat rooms, online social networks, or even real-space groups and attempt to undermine percolating conspiracy theories." In light of such proposals for dealing with citizens seeking truth, that Cass Sunstein is "one of America's leading constitutional scholars" (See above link to the White House announcement) is appalling.
The authors contend that "crippled epistemology" arises from the "sharply limited number of (relevant) informational sources" used by conspiracy theorists, this making the theories "especially hard to undermine or dislodge; they have a self-sealing quality, rendering them particularly immune to challenge." (pg 3) This drips with irony, for information coming from the expertise found within the 9/11 Truth Movement, while both extensive and diverse, has been limited only through censoring by the U.S. Government. What's more, there has rarely been a "theory" more resistant to opposing information -- more absolutely and officially "self-sealing" -- than the mockery that is the official 9/11 Commission Report.