This is a bit scary. I would not be able to write functional programs without knowing at least some of the infrastructure the code runs on (albeit not down to the nand gate). If I would be a dick I would guess web programming :P.
If I would be a dick, I'd guess you haven't been in the field long enough to know everything that you don't know?
Even if you're, say, a competent assembly programmer, I'm sure there are plenty of areas you're unfamiliar with. Perhaps cryptography, the details of JIT compilers, or BGP? There's just a lot to know. Or perhaps you're just unusually talented.
