Americans are often misinformed, occasionally downright dumb, and easily misled by juicy-sounding rumors. But while the right wing is taking full advantage of this reality, the Left worries that calling out lies is "rude."

Remember when Congressman Joe Wilson stood up during Obama’s State of the Union address and shouted “You lie”? He was chastised soundly by the pundit class. But mostly he drew heat for being impolite, and was compared to Kanye West and other famous interrupters.

Revisiting Wilson's foolish tirade underscores the state of our upside-down political world. Wilson shouted “you lie” in the face of truth, but President Obama is hesitant to speak up when he’s being slandered with bald, glaring untruths. The dark irony will continue as the Republicans take over the House this winter and the rumors and insinuations from extremist right-wing pundits keep circulating. It feels like no one with a loud enough megaphone has the courage to call a spade a spade, or more accurately a lie a lie.

We’ve gone far beyond Stephen Colbert’s “truthiness” into a more “truth-be-damned” environment; what Rick Perlstein described in the Daily Beast as a “mendocracy. As in, rule by liars.”

Here are some examples of recent ways we have made inroads in ignorance:

Polling data during and after last week’s midterm elections suggested that many Americans genuinely believe President Obama has raised their taxes — even though the reality is that our president actually lowered them for most of us. This means that people trust pundits like Rush Limbaugh, a major force behind spreading that lie, over the numbers on their own tax returns.

Another recent phenomenon? Half of new Congressmen don’t believe in the reality of global warming. It’s not that they don’t just disagree on the source or the severity of the problem. They flat out don’t think the world is getting warmer–despite the evidence outside their windows.

The new Congress will probably try to restore millions of dollars of funding for scientifically inaccurate, largely disastrous abstinence-only curriculum in schools, many of which have been shown to spread lies like "condoms don't work" and "abortion causes cancer."

News outlets picked up a wildly inflated and completely outlandish claim from an Indian blog that Obama’s trip abroad cost $200 million a day–and listeners have swallowed it. (In this case, the White House flat-out denied it.)

The scary thing is, these kinds of rumors have a way of taking root in the popular consciousness. Just as the election season began heating up earlier this year, Newsweek published a list of “Dumb Things Americans Believe.” While some of them are garden-variety lunacy, a surprising number are lies that were fed to Americans by our leaders on the far-Right. This demonstrates that media-fed lies can easily become ingrained in the collective memory if they’re not countered quickly and surely. Newsweek’s list included the following 12 statistics taken from recent and semi-recent polls and surveys. The first half are directly related to right-wing rumormongering.

Nearly one-fifth of Americans think Obama is a Muslim. Thanks, Fox news, for acting like this was a matter of opinion, not fact.

25 percent of Americans don’t believe in Darwin’s theory of evolution while less than 40 percent do. Consider the fact that several of our newly elected officials, specifically newly elected Kansas Governor Sam Brownback, share that belief.

Earlier this year, nearly 40 percent of Americans still believed the Sarah Palin-supported lie about "death panels" being included in health care reform.

As of just a few years ago, about half of Americans still suspected a connection between Saddam Hussein and the attacks of September 11, a lie that was reinforced by none other than Dick Cheney.

While a hefty amount of this demonstrable cluelessness gets better as the respondents get younger, all is not well in the below-30 demographic. A majority of “young Americans” cannot identify Iraq or Afghanistan–the places their peers are fighting and dying–on a map.

Two out of five Americans, despite the whole separation of church and state being a foundation of our democracy thing, think teachers should be able to lead prayer in classrooms. So it seems those right-wingers clamoring to tear down the wall between church and state aren’t the only ones who don’t know their constitutional principles.

Many Americans still believe in witchcraft, ESP and other supernatural phenomena. Does that explain why Christine O’Donnell was so quick to deny her “dabbling”?

Speaking of antiquated religious beliefs, about a decade ago, 20 percent of Americans still believed that the sun revolves around the earth. That's just sad, considering that even the Vatican has let Galileo off the hook for being right.

Only about half of Americans realize that Judaism is the oldest of the three monotheistic religions. Other examples of wild misunderstanding about religion and the separation of church and state can be found in this fall’s Pew survey on Americans’ religious knowledge.

This one made a huge splash when it appeared. In 2006 more Americans were able to name two of the “seven dwarves” than two of the Supreme Court justices. And that was before Kagan and Sotomayor showed up. To be fair, Happy and Sleepy are easy to remember.

More Americans can identify the Three Stooges than the three branches of government–you know, the ones who are jockeying over our welfare.

So what to do in a political and cultural landscape in which well-told lies have more validity than fact-based truth? Perlstein explained how this environment gets created by explaining what happened on Election Day this year:

“…by a two-to-one margin likely voters thought their taxes had gone up, when, for almost all of them, they had actually gone down. Republican politicians, and conservative commentators, told them Barack Obama was a tax-mad lunatic. They lied. The mainstream media did not do their job and correct them. The White House was too polite—"civil," just like Obama promised—to say much. So people believed the lie.”

We’ve entered a bizzarro world in which calling out lies is considered rude, says Perlstein, so liars are allowed to sit tight and dominate the discourse. This gels with Bill Maher’s critique of the Rally for Sanity, that calling for “balance for balance’s sake” ignores two important aspects of news reporting: facts and evidence.

Blaming Americans for being ignorant unwashed masses–or taking potshots at an education system that doesn’t teach critical thinking– would be the easy answer to this conundrum.

But the reality is that if messaging has such a big effect on Americans, then messaging matters. Folks on our end have to counter the lies with well-told, unabashed unironic, truth-telling. And we have to demand that our media, and our politicians, call out the other side. As Perlstein notes, “When one side breaks the social contract, and the other side makes a virtue of never calling them out on it, the liar always wins. When it becomes 'uncivil' to call out liars, lying becomes free.”

Even worse, once lies begin to spread, they become more than rumors–they become permanent beliefs.