Actually it makes sense because the slave always ask the master whether they're currently communicating with the controller. Master boot record also, because the program from the record controls the boot process of associated partitions.
And yes, the master makes no decisions on his own, the master simply sees which of the slaves has indicated that he wishes to be passed control, and then the master passes all control onto that slave and leaves.
I completely forgot what slavery means. I thought that slavery meant that masters controlled the slaves and the slaves didn't have freedom. Thanks for correcting my misunderstanding.
Comments like this do not help, regardless of how right you are on the underlying issues.