Invert, always, invert

> man muss immer umkehren - Carl Gustav Jacob Jacobi (loosely translated - Invert, always, invert) Today, we will look at one of my favourite mental models called - The Inversion principle. Mental models [https://fs.blog/mental-models/#what_are_mental_models] are a set of simple, abstract but useful principles that help us make sense of the world around us. I came across the Inversion principle on the Farnam Street blog [https://fs.blog/2013/10/inversion/]. It is also a favourite of Charlie M