An OptimisticSynchronizationStrategies, that speculatively executes received commands in order of arrival and handles late messages by rewinding to a snapshop '''and''' sending 'anti-messages' for the commands sent between.

Used e.g. for RealTimeNetworkGames (mentioned in http://warriors.eecs.umich.edu/games/papers/netgames02-tss.pdf).

See http://www-hpc.jpl.nasa.gov/PEP/pls/tw.html

SynchronizationStrategies