Questions 'bout scopes

so from what I understand scopes scramble all the variable/function names inside of them to prevent name collision with other triggers.
whats the point of the public / private keyword for scopes? public implies outside access, but I can't figure out how to do it


how would i access the unit "u" from outside the scope?

example_u This is generally considered ugly, so most people prefer to just give all public stuff long unique names and then skip the public keyword.