Comment by paytonjjones

This can usually be solved by scale alone (in all three contexts: RL, evolution, and IRT / psychometric testing)

The co-occurence thing is often not a bug of the algorithm but a genuine part of the stochastic landscape that must be solved. Evolution isn't "failing" when sickle cell vulnerability is ported along with malaria resistance; it's just a real tradeoff being made in the current biological landscape.