We can get a complete, consistent model of a small piece of the world using Event Sourcing. This is powerful but expensive. Jessica Kerr, aka jessitron blog 
Jessitron has a knack for explaining things clearly. Strongly recommend almost everything I've seen of her blogs and recorded talks.
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See Event Sourcing
See Event Storming
Wiki also has Events on the Wire
See The Story of Advancers blog
See Flow of Episodes and Episodes in Context