There's this town with two blacksmiths - one, a swordsmaker and the other, a shield maker. The swordsmaker's swords can slice through anything as a rule and the other guy's shields cannot be destroyed. Now they get cut up with each other for some reason and pit their wares against each other. What do you expect happens?
The sword slices through, but does not destroy the shield, as it cannot be destroyed but the sword can slice through anything.
Both can coexist
