Every deck is data-driven now — tone only changes the voice

"Data-Driven" used to be one of three tones in the deck wizard, which implied the other two were something else. They should not be. The rule it carried — use the figures the research actually contains, say where each one came from, and never fill a gap with an estimate — is now the base under every deck, so Professional and Bold decks are written to the same standard. The tone picker is left with what it was always for, the voice: Professional explains and advises, Bold says it straight. The sample under each tone now shows the same finding in both voices, so you are comparing the register rather than two different sentences. Decks already created with Data-Driven keep working and regenerate as before. On the API, tone_prefix: "data_driven" is deprecated but still accepted, and behaves like professional — no integration needs to change.