The presumption of innocence is theoretical at best. A prosecutor will present a theory of the case along with their evidence. Simply undermining that theory is

The presumption of innocence is theoretical at best. A prosecutor will present a theory of the case along with their evidence. Simply undermining that theory is often not enough to convince a jury, they’ll often expect the defence to put forward and substantiate a superior theory. I don’t know the motives of putting that in the warning. But it is at least true, even if it’s almost universally not a good idea.