Thanks to Ada Lovelace's example, writing a program and never testing it is a time-honoured tradition among computer programmers.
♲ @gutenberg_org@mastodon.social: Ada Lovelace's notes were labelled alphabetically from A to G. In Note G, she describes an algorithm for the Analytical Engine to compute Bernoulli numbers. It is considered to be the first published algorithm ever specifically tailored for implementation on a computer, and Ada Lovelace has often been cited as the first computer programmer for this reason. The engine was never completed and so her program was never tested. via @wikipedia