The point of my link was that the NYT kept the author of that opinion piece anonymous. They're really stretching the definition by calling the author a "source"

The point of my link was that the NYT kept the author of that opinion piece anonymous. They're really stretching the definition by calling the author a "source", though I suppose he is the paper's best source for his own opinion. In Miles Taylor's case, they recognized the importance of anonymity for authors whose job would be jeopardized by disclosing their name. In Scott Alexander's case, they ignored it.