Danielle

“The 80/20 Rule It’s so easy to get things out of proportion, but luckily there are also some easy solutions. Whenever I have to compare lots of numbers and work out which are the most important, I use the simplest-ever thinking tool. I look for the largest numbers. That is all there is to the 80/20 rule. We tend to assume that all items on a list are equally important, but usually just a few of them are more important than all the others put together. Whether it is causes of death or items in a budget, I simply focus first on understanding those that make up 80 percent of the total. Before I spend time on the smaller ones, I ask myself: Where are the 80 percent? Why are these so big? What are the implications? For example, here’s a list of the world’s energy sources, in alphabetical order: biofuels, coal, gas, geothermal, hydro, nuclear, oil, solar, wind. Presented like that, they all seem equally important. If we instead sort them according to how many units of energy they generate for humanity, three outnumber all the rest, as this graph shows.”
― Hans Rosling, Factfulness: Ten Reasons We're Wrong About the World—and Why Things Are Better Than You Think

“Ask yourself, "What kind of evidence would convince me to change my mind?" If the answer is "no evidence could ever change my mind about vaccination," then you are putting yourself outside evidence-based rationality, outside the very critical thinking that first brought you to this point. In that case, to be consistent in your skepticism about science, next time you have an operation please ask your surgeon not to bother washing her hands.”
― Hans Rosling, Factfulness: Ten Reasons We're Wrong About the World – and Why Things Are Better Than You Think

“The most important thing you can do to avoid misjudging the importance of something is to avoid isolated figures. Never, ever, leave a figure alone. Never believe that a figure can be significant on its own. If you are presented with a figure, always ask At least one more. Something to compare it to. Be especially careful with large figures. Funny, but figures that exceed a certain size, if not compared to something, always seem large. And how can you not be important something big?”
― Hans Rosling, Factfulness: Ten Reasons We're Wrong About the World – and Why Things Are Better Than You Think

“In a devastating of example critical thinking gone bad, highly educated, deeply caring parents avoid the vaccinations that would protect their children from killer diseases. I love critical thinking and I admire scepticism, but only in a framework that respects evidence. So if you are sceptical about the measles vaccinations, I ask you to do two things. First, make sure you know what it looks like when a child dies of measles. Most children who catch measles recover, but there is still no cure and even with the best modern medicine, one or two in every thousand will die from it. Second, ask yourself, “What kind of evidence would convince me change my mind about vaccination. If the answer is ‘no evidence could ever change my mind about vaccination,” then you are putting yourself outside evidence-based rationality, outside the very critical thinking that first brought you to this point. In that case, to be consistent in your scepticism about science, next time you have an operation please ask your surgeon not to bother washing her hands.”
― Hans Rosling, Factfulness: Ten Reasons We're Wrong About the World – and Why Things Are Better Than You Think