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Did CIA Director William Casey really say, "We'll know our disinformation program is complete when everything the American public believes is false"?

Comment from below:

Originally Answered: Did William Casey (CIA Director) really say, "We'll know our disinformation program is complete when everything the American public believes is false."?
 
"I love how people are still arguing this quote isn't real EVEN AFTER THE SOURCE OF THE ORIGINAL QUOTE AT THE WHITE HOUSE IN 1981 comes in here and personally vouches for hearing it with her own ears where and when... Guess the contents of the quote ARE true."
 
 William Petroff, B.A. in political science
 
 
Barbara Honegger
Barbara Honegger, studied at Stanford University
 
 
Greg Smith
Greg Smith, studied at University of California, Santa Cruz
 
 
Thommy Berlin
Thommy Berlin, works at Musicians
 
 
 
Geoffrey Widdison
Geoffrey Widdison, Engineer, reader, thinker, dreamer. Scientist, scholar, Latter-Day Saint.
 
 
Bill Bray
Bill Bray, Former (Retired) Research Scientist at Central Intelligence Agency
 
 
Matt Egan
Matt Egan, former US Intelligence Officer (1963-2006)
 
 
John Gibson
 
 
Don Harmon
Don Harmon, Will not confirm/deny duty with certain US intel agencies.
 
 
Don Harmon
Don Harmon, former intell analyst, former coll. poli sci professor. (1999-2013)
 
 
Fred Landis
Fred Landis, Investigative Reporter
 
 
David Chen
David Chen, Software Engineer at Vimeo (2012-present)
 
 
Melissa Melton
Melissa Melton, studied at Missouri State University
 
 
 
Eric Baum
Eric Baum, Founder and President at Truthsift Inc. (2013-present)
 
 
Mike Leary
Mike Leary, Psychotherapist in private practice, Individual-Marital-Parenting-A&D
 
 
Ozgur Zeren
Ozgur Zeren, Author at ViaPopuli.com