We can’t resist a brief digression into cognitive neuroscience. For a short, dazzling survey of Professor Rebecca Saxe’s latest research in the neural basis of theory of mind, i.e. how does our brain allow us to understand the mind of others, click http://amps-web.mit.edu/public/techday/2009/, and fast forward to 52:30. You will never think about cheese sandwiches the same way.