Unless "inaccessible" is a binary condition ... a piece of paper can't be read by a visually impaired person.

I guess that's the arguement. Although it still doesn't make any sense to me. I know just enough about computers that I'm not convinced voting by computer will ever be a particularly good idea. Any system can be hacked of course, but I'd rather make it as difficult as possible. Hacking a computer seems entirely too easy to trust. IMHO