Okay I have to admit it, I was fibbing last post. The mechanics i listed may in fact work for a very loose abstract representation of every contest in a game universe by making extremely likely events extremely likely and extremely unlikely events extremely unlikely. But do we really want that in RPG land?
What do we want mechanics to solve? Do we really need a mechanic to tell us a 10 tons weight dropped on James Bond's head will kill him? Do we ever need to compare Aunt May and Galactus in a head to head bout? How about an apatosaur stomping on Kongor the Dinosaur hunter?
If we decide for or agaisnt those extreme cases being solved by a game mechanic over GM judgment how much granularity between cases matters? Is it worth having a difference between A Zwiehander and a Dagger? Are butcher knives and stilettos all that different from each other?
What do we want? Plausible mechanics to resolve human scale conflicts? Plausible mouse vs mammoth resolution systems? Do we really need one mechanic to rule them all?