Better Way To Identify Spies And Spy masters

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If Spymaster #1 manages to implant Spymaster #2, that doesn't make Spymaster #2's mindslaves loyal to Spymaster #1, does it? I always thought Spymaster #2's mindslaves would remain loyal to Spymaster #2 only, and it would be Spymaster #2's responsibility to get his mindslaves in line with Spymaster #1's orders.