"Reality. It used to seem so simple -- reality just was, like the weather. Why question it, let alone disagree about it? And then came the assault, and unending stream of 'fake news,' 'alternative facts,' and lies disguised as truths, all of it overwhelming our notions of reality. Now we can't even agree on what a fact is, let alone what is real. How on earth did we get here? Here's how." --