Thanks for your input, atze.  I believe you.  But to confirm it, we need the 
documentation.

On 2010 Feb 11, at 00:19, Alexander Spohr wrote:

> Every NSManagedObjectContext holds its own but unique copy of your object.

I understand that each managed object context makes separate copies, but I 
wouldn't say that it necessarily follows from this that any given managed 
object context could not create more than one.

> This is because the object in the sql-store needs a primary key.... I would 
> have thought that your inserted object gets the persistent key set and will 
> therefore be the same object as the fetched ones. But I did not check your 
> code for a misconfiguration.

Well, it works as I said.

> No, you will always get the same object. Because this was why CoreData and 
> EOF where made for. Exactly this.

That's what I'm looking for.  If anyone can find "always get the same object" 
in the API documentation, please do so.

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