"High intelligence" refers to having a very smart or clever mind. It means being able to learn and understand things quickly, solve problems easily, and think critically. Full definition
The children in the first group — born to women who had morning sickness — tested with higher intelligence scores than those in the second group. (pregnancymagazine.com)
It is more than just high intelligence in that it involves taking in views from all sides before rendering a decision. (positivepsychologynews.com)
High intelligence makes it a breeze to train and its disposition is gentle to begin with. (animalso.com)