You Don't Know Jack About Formal Verification

- Formal verification is a method of proving that a computer system behaves correctly for every possible input, using mathematical logic. It's far more rigorous than testing (which checks only sampled inputs).<br/>- The title alludes to an old trivia game ("You Don't Know Jack") to imply that most developers misunderstand what formal verification can and cannot do.<br/>- The article appears in *ACM Queue*, a publication of the Association for Computing Machinery, aimed at practicing software engineers — so the intended audience is professional developers, not academics.<br/>- Formal verification has historically been used in safety-critical domains (avionics, medical devices, cryptography) but is increasingly discussed for general-purpose software, especially as bugs in infrastructure (e.g., compilers, databases) cause high-profile outages and security flaws.<br/>- Key tension: verification can prove correctness of a *model* or *specification*, but cannot prove that the real-world hardware, compiler, or human assumptions are correct — hence the "you don't know Jack" point about hidden gaps in what verification actually guarantees.