What you make up in your heads sticks if it's good, falls out if it's bad. If we still remember something a day after we made it up, it might be worth building on.
I mean, we sit around and we go, you know, 'Torture doesn't work.' Well, it's been around for 5,000 years. Most stuff that doesn't work goes the way of the dodo pretty quick, like waterbeds and 8-tracks and things like that.