Why Formal Methods Matter: The Calendar Problem
A single, familiar rule — is a year a leap year? — hides more complexity than it looks like, and shows why testing alone can't catch what formal verification proves gone.
Video 0 shows how a single, familiar rule — is a year a leap year? — hides more complexity than it looks like, and walks through why testing alone couldn't catch a bug that formal verification finds and proves gone. If you've ever wondered what "formal methods" actually buys you beyond more tests, this is the fastest way to see it: a real calendar bug, a real proof, and the difference between code that passed its tests and code that's actually been shown correct.
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