Sure. When we're looking at socially constructed stuff, though, I'm not sure it makes sense to treat its reality as discrete rather than continuous.

It's tempting to use money as a measure of social reality, actually, since it's valuable directly in proportion to people's belief in its value. Unfortunately it's hard to put a dollar value on, say, traffic laws, which share the same property (a point driven home for me the first time I encountered rush-hour traffic in Manila).