Addressing your last point because I'm not informed enough to argue the first questions: They differ only in the amount of space it takes to give an example. Imagine a loved one being held as leverage to force you to kill someone. You could beg/plead/bargain to avoid it, but if the only email that's published is the one that says "it's done. he's dead" that strips away a significant bit of context. Now, scale things up to state-level complexity and imagine being able to cherry pick the context in which things are said.
Re: Imagine a loved one being held as leverage to force you to kill someone. You could beg/plead/bargain to avoid it, but if the only email that's published is the one that says "it's done. he's dead" that strips away a significant bit of context.
I don't understand your example - murder coerced by blackmail is still murder. I imagine if this email was actually released to the public and people found out I was a murderer, when the police arrived I would show any documentation of the threat or call attention to the fact that my missing relative was being held. Society would be better off knowing I was a murderer and that I claimed to be coerced because then the perpetrators would at least have a harder time reusing the same tactic.
If that murder evidence email was released and discussed online, it'd be weird to see it be disqualified in discussion, despite being believed to be true, because of a belief that there might be a second email which compelled the execution of the murder. It would be fine for someone to show this second email as part of a defense, but again this example is kind of tricky because being compelled to murder under the threat of murder doesn't justify murder.
