Gen AI's probabilistic nature creates entropy precisely where complex systems need precision. The V-model dev model is the standard for critical products developed for the medical industry. The deeper you are into your V-model product development cycle, the more it costs to fix a defect. Pattern matching from Gen AI introduces exactly the kind of entropy later in the development cycle that destroys complex systems requiring precision. Tau functions through formal specification synthesis. When you write requirements in Tau's decidable logic language, the system doesn't guess or pattern-match. It proves program correctness against the specification given.