Take a closed $n$-manifold $M$ and fix a nice $n$-ball $B$ in $M$. How much information about $M$ does the set of knotted $(n-2)$-spheres of $B$ which are unknotted in $M$ give?


Question: Why did OCP build Robocop?
Answer: The concept of Robocop is not to substitute human police, it is the idea of a super reinforcement for police departments.

Of course they won't be able to enter on an industrial production scale, however, maybe one or two of them could be deployed in almost every big city, that would be a huge business as I can assure you that such a project is not a cheap one, although it's results are out of question. I'm sure every city mayor would like to have one or two of them on their police departments.

Also... he's a prototype. The I+D research is a continual loop where you evolve your product, getting better functionalities with each iteration and cutting down construction costs. With time the cyborg integration would probably be applied to live volunteers, in fact I supose that's the real objective, however you cannot risk human volunteer lives in such a project withour previous tests, usually you use rats, or monkeys, but for this project they needed a human-like system to build.