Strong Emergent Behaviors are, by definition, essentially impossible to predict. Any sufficiently new and/or complex system should be expected to have Unknown Unknowns. The only method around these problems is to expect to have to go through them, adjust, and try again. Planning Fallacy may lead you to believe you can one-shot kill your problems with some whiz bang new system, but they need to be stress-tested by different people in different environments and configurations.
Put another way: predicting future Emergence requires hindsight.
If you don't expect to fail, then you will.
Source
- SEBoK
- Life.