In fact, Dennett argues in considering what makes us human, one of the hallmarks of our intelligence is our ability to remember our previous thinking and reflect on, learn from it, use it to construct future thinking. Reminding us to beware our culture’s deep-seeded fear of being wrong, he advocates for celebrating the "ignorance" that produced the mistake in the first place:
So when you make a mistake, you should learn to take a deep breath, grit your teeth, and thenexamine your own recollections of the mistake as ruthlessly and as dispassionately as you can manage. It’s not easy. The natural human reaction to making a mistake is embarrassment and anger (we are never angrier than when we are angry at ourselves), and you have to work hard to overcome these emotional reactions. Try to acquire the weird practice of savoring your mistakes, delighting in uncovering the strange quirks that led you astray. Then, once you have sucked out all the goodness to be gained from having made them, you can cheerfully set them behind you, and go on to the next big opportunity. But that is not enough: you should actively seek out opportunities to make grand mistakes, just so you can then recover from them.
Dennett turns to card magicians for an analogy: Many of their "tricks" actually rely on chance to work, but they’ve devised numerous strategies of varying complexity to smoothly mask for the failed tricks in which chance isn’t in their favor. Their mistakes thus become invisible but their successes, those instances in which chance appears magical, become gloriously visible to the audience’s awe and delight. Dennett compares this to science:
Evolution works the same way: all the dumb mistakes tend to be invisible, so all we see is a stupendous string of triumphs. For instance, the vast majority – way over 90 percent – of all the creatures that have ever lived died childless, but not a single one of your ancestors suffered that fate. Talk about a line of charmed lives!
One big difference between the discipline of science and the discipline of stage magic is that while magicians conceal their false starts from the audience as best they can, in science you make your mistakes in public. You show them off so that everybody can learn from them. … It is not so much that our brains are bigger or more powerful, or even that we have the knack of reflecting on our own past errors, but that we share the benefits that our individual brains have won by their individual histories of trial and error.