William J. Brennan, Jr., Keyishian v. Board of Regents of the University of the State of New York…
“ The additional requirement, that the person participating in distribution of the material be one who 'advocates, advises, teaches, or embraces the duty, necessity or propriety of adopting the doctrine' of forceful overthrow, does not alleviate the uncertainty in the scope of the section, but exacerbates it. ”
