Pretending to know

> I thought further and said: “Why do men lie over problems of such great importance, even to the point of destroying themselves?” And they seemed to do so because although they pretend to know all, they know nothing. Convinced they know all, they do not attempt to investigate the truth.

– [Zera Yacob, 17th-century Ethiopian philosopher](https://ethiopianphilosophy.wordpress.com/2012/05/23/treatise-of-zera-yacob-chapter-iv)

And this:

> One of the saddest lessons of history is this: If we’ve been bamboozled long enough, we tend to reject any evidence of the bamboozle. We’re no longer interested in finding out the truth. The bamboozle has captured us. It’s simply too painful to acknowledge, even to ourselves, that we’ve been taken. Once you give a charlatan power over you, you almost never get it back.

– [Carl Sagan](https://en.wikiquote.org/wiki/Carl_Sagan)