What exactly does @dynamic do? Specifically, in the context of a Core Data managed-object? Here's what I do understand:

1) You create an 'entity' in the .xcdatamodel file
2) You ask Xcode to create the class files for you
3) The .m file contains @dynamic instead of @synthesize for each of the entity's 'attributes' (which now correspond to instance variables in a class derived from NSManagedObject)

Here's what I don't understand:

Why doesn't it just @synthesize the accessors? What would happen if I replaced the @dynamic with @synthesize? Would it blow up, or just have weird performance issues?

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