A computer can execute millions of instructions in a second. The human brain, in comparison, is painfully slow. The memories of a single year, for instance, took me a full thirty seconds to recall. Which is a long time if you think about it. Imagine a second-hand sweep going tick by tick halfway around the face of a clock. Or the digital readout of light-emitting diodes, with their blink, blinkâ€”thirty blinksâ€”as they count off time.
The immigration agent at the San Francisco airport