“Lies propagate, that’s what I’m saying. You’ve got to tell more lies to cover them up, lie about every fact that’s connected to the first lie. And if you kept on lying, and you kept on trying to cover it up, sooner or later you’d even have to start lying about the general laws of thought.”
Harry Potter in Ch. 65 http://www.fanfiction.net/s/5782108/65/Harry_Potter_and_the_Methods_of_Rationality
Harry Potter and the Methods of Rationality (2010 - 2015)
Context: Lies propagate, that’s what I’m saying. You’ve got to tell more lies to cover them up, lie about every fact that’s connected to the first lie. And if you kept on lying, and you kept on trying to cover it up, sooner or later you’d even have to start lying about the general laws of thought. Like, someone is selling you some kind of alternative medicine that doesn’t work, and any double-blind experimental study will confirm that it doesn’t work. So if someone wants to go on defending the lie, they’ve got to get you to disbelieve in the experimental method. Like, the experimental method is just for merely scientific kinds of medicine, not amazing alternative medicine like theirs. Or a good and virtuous person should believe as strongly as they can, no matter what the evidence says. Or truth doesn’t exist and there’s no such thing as objective reality. A lot of common wisdom like that isn’t just mistaken, it’s anti-epistemology, it’s systematically wrong. Every rule of rationality that tells you how to find the truth, there’s someone out there who needs you to believe the opposite. If you once tell a lie, the truth is ever after your enemy; and there’s a lot of people out there telling lies.
Help us to complete the source, original and additional information
Eliezer Yudkowsky 56
American blogger, writer, and artificial intelligence resea… 1979Related quotes

As quoted in Land Your Dream Job : High-Performance Techniques to Get Noticed, Get Hired, and Get Ahead (2007) by John Middleton, Ken Langdon, and Nikki Cartwright

2015, Adios, America: The Left's Plan to Turn Our Country into a Third World Hellhole (2015)

21 September 1747
Letters to His Son on the Art of Becoming a Man of the World and a Gentleman (1774)

“Lie until even you believe it - that's the real secret of lying”
Source: White Cat

“Sometimes,” Sam says, “I can’t tell when you’re lying.”
“I never lie,” I lie.”
Source: White Cat

On The Road To Find Out
Song lyrics, Tea for the Tillerman (1970)
"Eighth Air Force," lines 16-20
Losses (1948)