How RowFold checks its own numbers — Why an answer needs a receipt

A language model can write a confident sentence containing a wrong number, and nothing about the sentence looks different when it does. That is the single reason not to trust AI with an operational question — so RowFold does not ask you to. Instead of promising the model is right, RowFold checks it. After the answer is written, every figure in it is re-computed against your live tables and compared to what was claimed. You see the outcome on the answer, and you can open the whole working.