Thanks.

As you can see, some of the comments are great examples of what you’re talking about. Assume everything is fake unless incontrovertibly proven to them personally (except for people who really want to believe the leak theory, in which case assume it’s true no matter what).

Innocent until proven guilty beyond a reasonable doubt is a just standard for criminal cases, because it ensures protection of individual rights.

But nation-states often have no choice but to make decisions under some degree of uncertainty. No matter what they do, it’ll have consequences. And that applies to inaction as well as any particular action. So they have to go off the best information available, and act (or not) based on what’s probably true, as opposed to what’s been proven beyond a reasonable doubt.