For example, there are many examples of children's books written about topics like the Holocaust and slavery. Children's literature has no limits in terms of its subject matter, but authors who write about sensitive topics must risk offending parents if their work is seen as too advanced for children.
Medical Definition of mental capacity. 1  1: sufficient understanding and memory to comprehend in a general way the situation in which one finds oneself and the nature, purpose, and consequence of any act or transaction into which one proposes to enter.
Put simply intelligence is mental horsepower. If you have more horsepower, you can do more, faster. If you have less horsepower, you can probably do as much, but it will take more time and energy. An IQ is a quick way to reference this. When you take an IQ test, you are compared to people who have taken the test before.