The intersection is the locus of just the most general properties that
    all the definitions have in common, distinguishing what is most basic
    from what reflects POV.  Characteristically, in my developmental style
    of thinking, I see these generals as being explicit models of the vague
    beginnings of the concept, out of which the various versions developed,
    acquiring idiosyncratic historical dress along the way.

JA: I imagine that the intersection of &quot;all&quot; definitions will turn ou