*“This is how you work out what prime numbers are. First you write down all the positive whole numbers in the world. Then you take away all the numbers that are multiples of 2. Then you take away all the numbers that are multiples of 3. Then you take away all the numbers that are multiples of 4 and 5 and 6 and 7 and so on. The numbers that are left are the prime numbers. The rule for working out prime numbers is really simple but no one has ever worked out a simple formula for telling you whether a very big number is a prime number or what the next one will be….Prime numbers are what is left when you have taken all the patterns away. I think prime numbers are like life. They are very logical but you could never work out the rules, even if you spent all your time thinking about them.” *

*“And when I am in a new place, because I see everything, it is like when a computer is doing too many things at the same time and the central processor unit is blocked up and there isn’t any space left to think about other things. And when I am in a new place and there are lots of people there it is even harder because people are not like cows and flowers and grass and they can talk to you and do things that you don’t expect, so you have to notice everything that might happen as well. And sometimes when I am in a new place and there are lots of people there it is like a computer crashing and I have to close my eyes and put my hands over my ears and groan, which is like pressing CTRL + ALT + DEL and shutting down programs and turning the computer off and rebooting so that I can remember what I am doing and where I am meant to be going. And that is why I am good at chess and maths and logic, because most people are almost blind and they don’t see most things and there is lots of spare capacity in their heads and it is filled with things which aren’t connected and are silly, like, “I’m worried that I might have left the gas cooker on.”* – The Curious Incident of the Dog in the Night-Time, Mark Haddon