The average person's short-term memory can hold only five to seven bits of data at any one moment. If you put more items in, others fall out. The older you are, the more you have crammed into those memory circuits. Twenty-five-year-olds can remember things because they still have empty space. Some of us take our children to the supermarket in the hope they will remember why we are there.

Thinking In The Future Tense (ed. Simon and Schuster, 2012) - ISBN: 9781471109546