Watts:

There’s a range, in other words. You don’t need anywhere near a complete brain to function in modern society (in fact, there are many obvious cases in which having a complete brain seems to be an actual disadvantage). And in a basic survival sense, the ability to write and appreciate the music of Jethro Tull and do other “civilised” things aren’t really that important anyway. […] So now I’m thinking, tewwowist virus: something engineered to take out higher brain functions while leaving the primitive stuff intact. Something that eats away at your cognitive faculties and lets your inner reptile off the leash, something that strips your topheavy mind down to its essentials, something that speeds your reflexes and cranks your vision even as it takes the light from your eyes. […] I’m thinking zombies. …

(The lead in is just as ‘good’.)

(Via.)