“If we start right out by asking ‘What is bias?,’ it comes at the question in the wrong order. As the proverb goes, ‘There are forty kinds of lunacy but only one kind of common sense.’ The truth is a narrow target, a small region of configuration space to hit. ‘She loves me, she loves me not’ may be a binary question, but E = mc^2 is a tiny dot in the space of all equations, like a winning lottery ticket in the space of all lottery tickets. Error is not an exceptional condition; it is success that is a priori so improbable that it requires an explanation.” – Eliezer Yudkowski, Rationality from AI to Zombies