Comment of the Day: Graydon: "'Truth' and 'facts' are different; "truth" is a statement about the inside of someone's head. (Generally one's own head.)
"facts" are that stuff independent of any particular person's imagination of the world. Facts are inherently collective.
If you've got enough money, you can blur this hopelessly because there's a bug in the wetware and anything that gets repeated enough becomes true. It helps a lot if the repeated thing is simple.
Keeping a political process facts-based is a hard problem, because you're effectively expecting people to prefer an effective process to getting what they want. That's challenging.
So there's a structural advantage on the "repeat lies" side. Any sensible framework of laws would take this into account...