Oodles. Troves. Tsunamis. With data increasingly stored in extraordinary volume, investigative journalists can and have been piloting extraordinary analysis techniques to make sense of these enormous datasets--and, in doing so, hold corporations and governments accountable. They’ve been doing this with machine learning, which is a subset of artificial intelligence that deepens data-driven reporting. It’s a technique that’s not just useful in an age of big data--but a must. The unwritten...