I was once told (and I've long since forgotten where I heard this) that the three most important aspects to include in any news story are (1) what do we know, (

I was once told (and I've long since forgotten where I heard this) that the three most important aspects to include in any news story are (1) what do we know, (2) how do we know it, and (3) what do we not know. I'm not sure I've ever read any news story that has hit all of these.