The popular, even ubiquitous metaphor used in cognitive neuroscience is that the brain can be likened to a computer. The similarities seem obvious: neuronal activity is binary (a neuron is either depolarized (ON) during an action potential or polarized (OFF) when inactive); our vision and hearing has many aesthetic similarities to a computer display (indeed, the monitor is made exactly to fit the human experience of colors, shapes, etc.); humans process information (we can sit down and think through a math problem, for instance). So on and so forth. But is the “brains are computers” metaphor accurate? And if not, then is adherence to this metaphor slowing down progress in neuroscience?