Before epilepsy was understood to be a neurological condition, people believed it was caused by the moon, or by phlegm in the brain. They condemned seizures as evidence of witchcraft or demonic possession, and killed or castrated sufferers to prevent them from passing tainted blood to a new generation.
The article misinterprets the results. Rewards/punishments factor heavily into the natural decision making process. We are taking about emergent phenomenon, not predestination.
Predestination is not determinism
Predestination is just determinism with God as the reason