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And... to answer your last second two questions, yes.
I think Watergate took care of people believing that authority figures will always have our best interest in mind.
It is a lot of work to keep on top of everything though. For the most part, competition can help protect from many kinds of lies.
By the nature of the game, it doesn't seem to work in politics though. For example, how many presidents, at the same time, can one country have?
Of all the lies that we have to deal with, I personally consider political lies to be the most dangerous. Currently, citizens really have no recourse if a politician lies in order to win an election. How do you prove that the politician did that or that circumstances changed or s/he got better knowledge and needed to be able to legitimately change his or her mind. And even if you could prove it, the only recourse most of the time, is to wait until their term is over and vote them out of office. That particular recourse is not enough to prevent abuse of power. And it's not particular effective when it appears that most politicians running for office are inclined to lie and misrepresent what they really intend to do once in office.
To answer your first question, I'd call upon a wide range of possibilities. First and foremost, though, most of the possibilities that I was thinking of when I typed that last part of the post in were not necessarily intentional deceptions, merely incorrect information that was accepted non-critically and used to help form the bases that one's worldview is built upon. Thus, saying lies, meaning intentional deception, was perhaps not the best way to put it. Perhaps saying believing lies, in the sense of false information, would be more accurate. To name a fairly general and obvious cultural example for children in some cultures, the story that Santa Claus is real and that he delivers gifts to all children is a lie.
I personally find the myth of Santa Claus fascinating. The idea that the same people who teach their children to be honest and that lying is wrong will also lie to their kids about Santa Claus! Upthread in post #74 I hypothesized that people teach their kids about Santa Claus because they also want them to know that often people lie, even people that they personally know and love.
I was hoping to get more responses about my theory -- but I got nothing.

I suppose that means that some people think that is so obviously true that its not worth talking about or that it is so obviously wrong that its not worth talking about .
To reference some less obvious and more general examples that likely would not be intentional lies, but are likely still incorrect, a child's belief that their parents are the best or worst parents ever, or that the culture, set of values, and various other things that they learned or were indoctrinated into are the "way things should be," "the best way of life," etc. Naturally, when these view meets other differing views formed in the same way, conflict of some kind tends to arise. There are self-deceptions that can easily be created by too much or too little praise, among other things. And... I think that that's just getting started with the sheer range of possibilities. Still, I hope that I managed to make myself reasonably understandable? If not, please, say so.
I think I know what you're saying. And coincidentally I was planning on posting about how I thought it was curious that in her book about lying Bok left out discussions about prejudice.
I think prejudice can be divided into at least three areas:
*Intentionally cultivated in oneself and in others to justify an unfair division of rewards and resources.
*One is sort of aware of one's prejudice in certain areas but believes that it is accurate and correct. I think some academic fields call this dysconsciousness. Its a way of viewing the world that doesn't take into account that its based on prejudice and that there may be more than one way to legitimately look at something.
* One's prejudice is so ingrained that one isn't aware of it.
The last two areas are definitely offtopic to Bok's book because of the way she decided to define the word "lie" for the purpose of discussing this topic. That is an intentional falsehood not believed by the liar, but intended to be believed by the listener and to deceive the listener.
I think the first category definitely would have made a great chapter in her book, and I do wonder why she left it out. Perhaps she never considered it, perhaps she did and thought it would be too inflametory and distract from what else she had to say. Perhaps if she read this post she would disagree that it was relevant to her topic. {shrug}
ETA: Actually, right after I finished writing this post, I think I know the reason that Bok left out the first category of prejudice from her book.
She only discussed category of lies where she also discussed the historical justifications given for them and then she discussed the shortcomings of those justifications.
Presumably she believed that there was no reason to discuss the first category of prejudice because presumably she thought it was unneccesary to discuss the shortcomings of the historical justifications for it. Good assumption, I think.