Is there a boolean function to test whether an object has been moved? Something like: 

: if (is_moved "object") {...}

By "moved", I mean it has been picked up at some point from its initial location. If not, I'll use a flag. I think I only need it for one object.

I did implement this a while back but not sure I kicked the tyres.

: if (is_at_initial_location "spoon") {
   // Do something
}