Roger Ebert: The rational film critic
Do the math. If one week you state, "'Mr. Untouchable' makes 'American Gangster' look like a fairy tale," and the next week we say, "American Gangster" was "Goodfellas" for "the next generation," then you must conclude that "Mr. Untouchable" is better than "Goodfellas."
See the rest of Ebert's critiquing rule book here.