Jacob Harris: Distrust Your Data (Source)
If you want to call yourself a data journalist, there is one shortcut you can never take: you must validate your data. Even the cleanest looking data might contain flaws and omissions stemming from its methodology. It’s not enough to run checks on the data itself. You must also lift your nose out of the database, ask the serious questions about how the data was collected and even use the well-honed tools of a traditional reporter to call experts when—never an if—you find questions about the data.