" In this chapter you may have noticed and perhaps even been irritated by the inconsistent spelling of realise and realize. It’s not a mistake but a subtle gesture to surface a delicate point. Different isn’t wrong. I am British and American, and this book will be read in many countries, so neither spelling is right or wrong. When in doubt, we’re told to pick one and be consistent. But why? Is it to maintain the illusion there’s one right way? Is it because diversity is inefficient? I invite you to ask if some irregularities that irritate may also inform. Why do they cause anger? What do you fear? What might they teach? "

― Peter Morville , Planning for Everything: The Design of Paths and Goals