How a journalist is like an aggregator

Joel Achenbach writes that he felt a bit guilty recently when interviewing a scientist on deadline: "Here I am calling up and saying: 'Give me the fruit of your mental labors.' Asking for the ripest fruit, as it were. Asking not just for information but for wisdom. Give it to me! For free. And they did, because they always do, because we have a system of sorts." Does that make him an aggregator, a journalist, or both? More from Joshua Benton.