zlacker

Sure, but it's important to spell out exactly which probability range they refer to -- unless you ground people in concrete numbers, they have a tendency to think they mean the same thing but actually mean very different things. (This is known as the illusion of agreement, for further reference.)

About verification I think you're right in a very specific sense: you clearly cannot verify that any single estimation is correct, range or not. However, meteorologists and other people dealing with inherent and impenetrable uncertainty have found out that a historic record of accuracy is as good as verification.