Now keep A and B's states stored on different machines and they become completely independent with no concept of time or ticks being introduced.
As to an actual example of this in use think bank accounts in an MMO, you might want a transaction log, but you don't necessarily care about time-stamps all that much.
As to an actual example of this in use think bank accounts in an MMO, you might want a transaction log, but you don't necessarily care about time-stamps all that much.