More than one piece of information, sometimes disparate, is joined together to create a novel concept. It gave us the ability to adapt and survive and it requires Working memory.
It helped us with
- Language (Sound + Object = Word)
- Cooking (Meat + Fire = Cooked Meat)
- Hunting (Stick + Flesh = Food)
- Clothing (Fur + hominin = warm hominin)
And it is our superior working memory that gives us an evolutionary advantage over other species.