I avoided mentioning bias for this reason. Discernible spin could be "obvious bias", since I'm referring to tradecraft, not honesty. Appreciate the material—I do enjoy reading older writing.
To be clear, bias need not be conscious or deliberate. There's a great piece by Lippmann on the Russian Revolution that details just how profoundly the press got the story wrong, in large part because they were relying on official sources rather than getting "the street" view (paraphrasing Lippann generously here).
Spin is pretty much always deliberate propaganda. It may not be an outright lie, but the primacy is on persuading or manipulating rather than informing.
