The invisible Truth.

Seeing the truth when it might be invisible
I’ll believe it when I see it. This is a problem. to work your way through life only believing what you could see and touch, only caring about what impacted your life right now.
The base of knowledge we have about the world has increased exponentially, and that knowledge compounds. Electrons and ozone and game theory and databases might all be invisible, they might be beyond your understanding, but they’re still important, still looming right at the edges of the life you live right now.

And second, of course, is the notion of a worldwide web of information, a system that brings every bit of news and data and discovery right to your door. While you may want to disbelieve what’s happening around you, that won’t make it go away, and what’s “around you” is now a much larger sphere than it ever was before.

Thus, two kinds of serious errors: believing in invisible things that aren't true, or insisting that the truth might not be. They're caused by fear, by deliberate misinformation and by being uninformed.