Thinking Fast and Slow

There are two 'Up' escalators on a recent journey. One is moving and full with people and the other is empty and stationary. As people arrive at the bottom of the escalators they gravitate to the right hand moving escalator, even though that is further away.

These people’s minds have made a shortcut. Empty, stationary escalator = not in use. But what if we slow down and think a bit more critically.

We are in Zürich airport and this is the main route to departures. How likely is it that the escalator is broken? Not very. And if it was, what would we expect to see? Engineers working to repair it or at the very least an ‘out of order’ notice.

A glance to the left and the bottom of the 'Down' escalator shows a little red light to signal don’t get on. Both 'Up' escalators have a little green light.

I step on to the stationary/empty up escalator. Life is breathed into it and it quickly and quietly accelerates. It turns out that the shortcut thinking was wrong.

It’s a classic case of System 1 and System 2 thinking as set out by Daniel Kahneman in his seminal work ‘Thinking Fast and Slow’.

I tell this story because I’ve just finished reading Michael Lewis’ excellent book ‘The Undoing Project’ about Kahneman’s collaboration with Amos Tversky and System 1 and 2 is at the front of my mind right now (if I hadn’t read it recently I would have fallen into the same trap as everybody else!). It’s a cracking good read and I can recommend both books to kick start the year.