Why a model rather than a disclaimer

Because the alternative is a page that is mostly true and gives you no way to tell which parts.

The first site in this family was written by a machine that could not reach the API it was documenting. A small, specific set of things was verified in a browser by a human; everything else was read from the vendor's reference. A disclaimer at the top would have covered both and distinguished neither. Six states, attached per sentence and joined to a table, mean a reader can see exactly which half they are standing on.

It also changes what a correction is. When that site's first render finally ran, four claims changed state in one afternoon and two predictions turned out wrong. With a ledger, that is a dated row moving from written, not run to verified — visible, checkable, and worth publishing. Without one, it is a paragraph quietly rewritten.