Intelligence in a cup? some have more and some less? Are you measuring with book smart knowledge or common sense real world knowledge.
We are all born with a brain.
I am a believer that the initial forming of that brain, barring physical challenges, are brought about in the first few years of life, and dependent on those around that person.
My understanding of "intelligence" is not how much schooling one person has, or how much facts or reading can be absorbed and memorized by that person, but how a person takes what they have learned and apply that to real life. Put it simply, I have seen college grads that can rattle off stuff that is amazing, that the "average" person might be clueless to. But in real world living, stuff that should be common sense to many, they are clueless, and dumb as a rock.
I have also seen high school grads that are smart as a whip. There life skills are way over the top of most people, being able to achieve things that a college grad would only dream of.
Many people have there own idea of what "intelligence" is. Some think it is how much knowledge a person has as in what they know in there brain or can memorize. Some think it is how a person acts it real life, and how they apply what they know. And certainly most of us all strive for maintaining the most information we can, and applying that information in a way that improves and makes life better.
I for one believe that in life, it is not how much you know, but how you take what you know, and how you apply it in life, that makes an individual "smart" or "dumb".
I am also a believer that some people are born with inherent traits, genes, DNA, or whatever you want to call it.
I have seen people that never took a music lesson in there life, but yet can play a piano like Mozart. I have seen people that never took an Art lesson in there life, yet paint a painting like Rembrandt.
There was just a post in here where someone mentioned they know a surgeon that ended his career by sticking his hand in a snowblower. He himself has treated many for doing the same, yet proceeded to his own demise. Is that an "intelligent" move, I think not.
This discussion could go on to infinity with what everyones interpretation of "intelligent" is. Kinda like religion, politics and sports, we all have our understanding of what each is, as we have developed it along each of our life path, as we have been taught, and what we have seen and even what we have gone through and experienced, and made our own choice as what we choose it to be, or what we participate in.