Douglas R. Hofstadter and Daniel C. Dennett
Publisher: Bantam Books (1982)

As a child I formulated the abstraction “human being” by seeing things outside of me that had something in common – appearance, behaviour and so on. That this particular class could then “fold back” on me and engulf me – this realization necessarily comes at a later stage of cognitive development, and must be quite a shocking experience, although probably most of us do not remember it happening. The truly amazing step, though, is the conjunction of the two premises. By the time we’ve developed the mental power to formulate On Having No Head 32 Them both, we also have developed a respect for the compelling of simple logic. But the sudden conjunction of these two premises slaps us in the face unexpectedly. It is an ugly, brutal blow that sends us reeling – probably for days, weeks, months. Actually, for years – for our whole lives! But somehow we suppress the conflict and turn it in other directions.