Comment by austin-cheney

https://en.wikipedia.org/wiki/Pareto_principle

https://en.wikipedia.org/wiki/The_Mythical_Man-Month

https://en.wikipedia.org/wiki/Conway%27s_law

My own is what I call the framework rule. All discussions of software frameworks eventually degrade to first person pronouns and the word easy. Knowing that you can always predict your audience and their desires well in advance with extremely high confidence/precision. Easiness is an unmeasurable subjective concept whose second order consequences are always measurable and always cost more and which are likewise identifiable and predictable. That makes it similar to a fractal of Conways law but it applies more broadly.