When we make decisions we tend to be swayed by what we remember. What we remember is influenced by many things including beliefs, expectations, emotions, and feelings as well as things like the frequency of exposure. The availability bias as it is known can substantially and unconsciously influence our judgment. We too easily assume that our recollections are representative and true and discount events that are outside of our immediate memory.

In 2016 insularity of opinion and experience led to shock and bewilderment for those on the losing side of two political events. People in the UK who…