~20 years into my life as a backend dev, and I came to realize that Greenspun's tenth rule has a twin, which I have not named yet, and it goes like this: "Any

~20 years into my life as a backend dev, and I came to realize that Greenspun's tenth rule has a twin, which I have not named yet, and it goes like this: "Any sufficiently complicated backend program contains an ad hoc, informally-specified, bug-ridden, slow implementation of half of Prolog."