It isn't solved. Just "workable". If 100% of messages are lost, the battle is lost. 100% only has to be "for a meaningful amount of time". Think of it like R

It isn't solved. Just "workable". If 100% of messages are lost, the battle is lost. 100% only has to be "for a meaningful amount of time". Think of it like Raid Arrays. They "solve" hard disk failure. But only up to a certain level of loss. You can lose 1 drive, but not 10.