[supercat]

Pardon my incredulity. But to my knowledge there has never been an anencephalic who " grew a brain".

There have been people whose scans were indistinguishable from anencephalics who became competant human beings. You may argue that they weren't really anencephalic but merely misdiagnosed. That may be true. But if doctors can make the mistake with a newborn, why not with a 27-year-old?