There is an overlap between the regimes described by gravity and thee regimes described by quanta mechanics. I don't think there's any right or wrong there at all. You just use whatever is most convenient for the situation you're in. Cavin says whenever i hear the word decoherence, i can help but think it's named backwards. A measured particle seems more coherent than an unmeasured one. Is it intuitive to think of decoherence as a process of becoming less coherent? Ah, yes that's perfectly fair. The reason we drew this analogy with decoherence is that issue of decolecidentality has been around since 18th century.