Do You Think Still Exist Master Hub Die After 2000?

To make a correct poll choice,
one must investigate how the various types of die doubling can happen during coin hub manufacture.
That is a numismatic learning exercise for those who wish to make the effort, and useful info for all CRH'ers.

I would think that hub doubling should be a very rare occurrence, because all dies and hubs should be very critically examined before use.
Laser digital checking of all later generation dies and hubs against the original master die and hub digital models should greatly reduce the human error factor.

If an error is missed, then millions of error coins potentially can be produced, making resulting circulation coins scarce at best, in terms of collector value.

I found some information on that to add to my image files.