Cynthia: Corporations amply fund research that generates marketable new technologies.
Statements
Cynthia: Marketable technologies get plenty of funding from corporations, but science is actually trying to solve the mysteries of the universe, so the govt. should help fund that purely theoretical stuff.
Luis: The point of using govt money for science is to fund discoveries that would benefit society as a whole. So it should only fund research that’s expected to yield practical applications.
Evaluation
Does Luis try to argue against any of Cynthia's explicit claims? Does Luis argue that corps do not amply fund research that generates sellable new tech? No. Does Luis argue that the fundamental goal of science is not to achieve a comprehensive knowledge of the universe? No. Does Luis argue that the govt should not be helping to fund basic science that is just about advancing our knowledge of nature? Yes, that seems to be fair, since Luis is saying that the govt should only fund stuff that is expected to yield practical applications.
Goal
So, essentially, they disagree over whether the govt should only fund science stuff expected to yield practical benefits, or whether the govt should also fund science stuff aimed merely at advancing our theoretical knowledge of nature.