 The other side of the formal/functional equivalence distinction is the notion of functional constancy. By functional constancy is meant the ability of basic equivalent values to operate as stable features of value processes and activity within various value communities. Locke envisions that what will be found beneath potentially vast differences in content, and beyond a similarity of form, is a comparable utility of various values across contexts. Every value has an attendant function; a role that it plays within a given value community. Values that differ either in form or in content may still be equivalent as regards their function. These functional constants are discovered through comparison of fundamental values found across value groups.