Cybermen

"Rose Tyler: Five million Cybermen? Easy. One Doctor? Now you're scared!"

"The cybermen are said to be logical creatures-and look how they behave. They've become a race of emotionless soldiers devoted to conquering the universe, destroying other species or forcing them to become Cybermen too."

"[W]ould a logical creature really behave like the Cybermen do? If not, how would a logical creature really behave? Or, to put it another way, what's the "logical" way to live? That's the question I'll be examining here by contrasting the views of philosophers Thomas Hobbes, John Stuart Mill, and David Hume, asking what they'd thin of Cyberman "logic and how Cybermen might've looked if they'd been designed according to the principles espoused by these philosophers; how they might have designed the Cybermen differently, given a chance. While my examples come from Doctor Who the issue of living logically has real-world importance. After all, we all have to decide if we care about living logically or not, and if we do not want to live logically, we'd better know what "living logically" requires of us."

"If David Hume had designed the Cybermen to be perfectly reasonable but emotionless, they'd do nothing at all. They'd have no impetus since they'd care about nothing. Mondas would simply drift past the Earth in "The Tenth Planet." Human scientists would no doubt eagerly attempt to contact this newly discovered form of alien life, but the Cybermen wouldn't even wave back at our telescopes. When the new Cybermen are brought to John Lumic, he'd bark orders at them only to be ignored by creatures who, lacking emotions, care no more about what he wants than about whether they live or die. Cybermen built to be reasonable but lacking emotion would be a race indistinguishable from statues, fit only to serve as shop mannequins."