Building a space station, in which astronauts would live for a considerable time, is essential even if the space station project were to contribute no new knowledge about space or earthe that could not otherwise be obtained. For future missions to explore mars, we will need the medical knowledge that the space station project will give us about the limits of human capacities to live in spacecraft for an extended time.
the argument makes the assumption that
a.) the exploration of mars will be carried out by people traveling in spacecraft and not by robots alone.
b.) the capacities of astronuts are typical of those of ordinary human beings.
Ok, I know that A is right and this is the one I picked on the real test. However, I don't know how to eliminate B. If I were to negate B, wouldn't it destroy the argument? If the capacities of astronutes were not Typical of those or ordinary human beings, this wouldn't really give any medical knowledge about the limits of human capacities to live in spacecraft for an extended time wouldn't it?
Can someone explain this? Thanks in advance.