Engineering teams
The spreadsheet the AI got wrong.
An engineer asks Claude to calculate thermal margins on a heat exchanger. The model produces a confident-sounding answer with three decimal places. The engineer trusts it. Ships the design. Three months later, the heat exchanger fails under load. The margin was wrong. The AI hallucinated the arithmetic.
Imagine asking the same question and receiving a signed receipt: the inputs, the method, the validated solver that ran the computation, and a SHA-256 hash you can independently verify. The answer is either provably correct or provably flagged as out of scope. No vibes.