Answer:
Hindisight bias.
Step-by-step explanation:
Known as "creeping determinism", the hindsight bias makes people tend to consider some events as more predictable than they actually are. Saying that kids WILL HAVE more diffictulty controlling their anger is risky because some kids are very calm and some grown ups have deep anger management issues. It is to jump ahead in conclusions based on perceptions you think that are "basic", but they are not always true.