[rules-users] Fusion - Why needs the stream time-ordered input

Hi, I'm restarting getting to know Drools (Fusion). Now I'm thinking about the stream processing mode. The documentation says the events must be time-ordered - they must be insert into the stream in the order in which they are occur so. Am I correct that it has to be that way, because the timestamps given to the events when they are insert into the working memory shall represent the correct order? My events already have an attribute representing their timestamp. I've told that the engine using the @timestamp(...) command. In that case, is it important anyway that the events are insert time-ordered? I'm thankful for any explanations and advises. Thank you :) Grettings Tina