"The first rule is that you've got to have multiple mental models. If you just have one or two that you're using, the nature of human psychology is such that you'll torture reality so that it fits your models. It's like the old saying, 'To the man with only a hammer, every problem looks like a nail.' That's a perfectly disastrous way to think and a perfectly disastrous way to operate in the world. You've got to have multiple models.” --Charlie Munger
