If evidence no longer matters in politics, what happens to democracy?

The government lies like hell about virtually everything, and we just sit there and swallow the lies more often than not because there's nobody to counteract them or contradict them. The President of the United States does not know truth from fiction and so he lies about his war, and the economy, and everything else you think and think of, and we sit and listen. Probably about half of us think he's telling the truth, and the other half of us are so disgusted that we don't contradict him. Government Storm Troopers kill people in the streets in Minneapolis in cold blood. When we see the videotapes, we know that these people did nothing to threaten the Storm Troopers, and yet the Storm Troopers and the people that tell them what to do say, "Oh, they pointed guns," as if that were really true. We can look at the videotapes and know it wasn't true, but it doesn't matter what we say. All that matters is what the government supervisors of the Storm Troopers have to say and the excuses they make. Why is that? What's this going to end in? What will it lead to?

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If evidence no longer matters in politics, what happens to democracy?
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