Hi,
you're presumed innocent: one believes in the truth of the assertion that you are you're innocent until the contrary assertion is proven (in a court of law)
True, but . . . interestingly, the jury's verdict is not worded as 'innocent', but instead as 'not guilty'. This seems to me to suggest a subtle distinction. (eg perhaps you're as guilty as sin, but we can't prove it.)
I believe the Scottish judicial system permits a third possible verdict which is worded as 'not proven'.
Best wishes, Clive