> Provenance is not essential; accuracy is. We have gone to considerable lengths to confirm that the information sent to us is accurate. We compared the tax data in our possession to other sources of the same information wherever we could find them, some of which were public (a tax return for a candidate for national office), others of which were private. In every instance we were able to check — involving tax filings by more than 50 separate people — the details provided to ProPublica matched the information from other sources.
They did assure themselves by verifying any detail that they could corroborate, it seems.
> Provenance is not essential; accuracy is. We have gone to considerable lengths to confirm that the information sent to us is accurate. We compared the tax data in our possession to other sources of the same information wherever we could find them, some of which were public (a tax return for a candidate for national office), others of which were private. In every instance we were able to check — involving tax filings by more than 50 separate people — the details provided to ProPublica matched the information from other sources.
They did assure themselves by verifying any detail that they could corroborate, it seems.