What it sounds like. A person created by artificial insemination is technically a Strong AI. But she can't automatically improve her intelligence and go FOOM, because nobody designed the human brain with the intention of letting human brains understand it. She can probably grasp certain of its theoretical flaws, but that doesn't mean she can look at her neurons and figure out what they're doing or how to fix them.
The distinction between AI and NI (Natural Intelligence) is almost a, well, an artificial one. There is plenty of reasons to believe that our brains, NI as they are, are improvable by us. The broad outlines of this have existed in cyberpunk sci fi for many years. The technology is slowly coming along, arguably no more slowly than is the technology for autonomous AI is coming along.
A person created by artificial insemination is technically a strong AI? What is artificial about the human species developing additional mechanisms to get male and female ...
If Strong AI turns out to not be possible, what are our best expectations today as to why?
I'm thinking of trying myself at writing a sci-fi story, do you think exploring this idea has positive utility? I'm not sure myself: it looks like the idea that intelligence explosion is a possibility could use more public exposure, as it is.
I wanted to include a popular meme image macro here, but decided against it. I can't help it: every time I think "what if", I think of this guy.