Index Introduction Broken things The troublehacker’s triangle A system is a point of view Mental models All models are wrong The evolution of a model Seeing what’s there The coffee machine The power of time Part 1: Think fourth-dimensionally! Part 2: Is the future like the past? Is the future like the past? Part 2 Part 3: Things that happen while you sleep Approach The scientific method The hypothesis generators Poke the box Make it look like this! The principle of recent change Put your experience to work! Outreach What do you do when you don’t know what you’re doing? In practice Understanding the performance of SQL statements in Oracle