So when the SCOTUS in Coffin v. United States wrote "The law presumes that persons charged with crime are innocent until they are proven by competent evidence to be guilty," they were just writing a slogan?
This whole debate, which is entirely moot since it's not a criminal trial, arises from the fact that "guilty" and "not guilty" (and "innocent" I guess) have both informal meanings and formal legal meanings, and those meanings are different. The OP used the formal meaning, in a formal context. People tossing about the informal meaning are not adding to the discussion.
This is a slogan, not a legal statement.