But I seem to recall that it was an open ended question to generate discussion. At the end, the discovered bright people were kidnapped by a robot working for aliens, who left them on a planet with a chocolate covered manhole which was the only known good food available.
I suspect that the story was just a vehicle to allow Niven to go on about Adam and Eve legends, genetics, and ... (memory dims)
They can't all be the best he's written. Oh, well...