Most hackers are willing to explain terms. Hackers love word games. Your hacker hasn't figured out how hard the problem is yet. Unlike most workers, hackers will try very hard to refuse to give an estimate until they know for sure that they understand the problem. This may include solving it.
Most hackers are good engineers.
Still, it's an estimate, and you get what you ask for. My hacker makes obscure, meaningless jokes. Most of them can be explained. It may take a while, but it may prove interesting. My hacker counts from zero.