[tabtab]

Re: "How does the particle know it has been observed?"

It's as if God's code looks something like:

    if (event.thisParticle.isBeingObserved()) {
       thisParticle.assignAttributes();
    }

[pjmorris]

"extreme late binding of all things?"

[tabtab]

Lack of compile-time type-checking gives us dodgy politicians and lawyers.