Auditing a large codebase is also probabilistic. Oversights happen, and there are ways to write code that looks like it does the intended behavior while also do

Auditing a large codebase is also probabilistic. Oversights happen, and there are ways to write code that looks like it does the intended behavior while also doing a second, nefarious thing. See https://www.ioccc.org https://www.ioccc.org