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> you can always compare the current state of the system to how you think it should be Unless what happens in the system is different now and old events don't

• ElevenLathe 4y ago
  Versioning your events can help with this, along with a test suite that will complain if you change the semantics of events with older versions.
• Joker_vD 4y ago
  Or the events do still make sense, it's just the processing rules for them have changed several times over the years and of course, the event "use the business rules ver. X.Y from now on" is not logged anywhere.