jehocifer wrote:"I know that I know nothing".
... is erroneous.
Perhaps; "I know one thing, and that is that I only know one thing."
But then the original purpose is defeated in that you 'think' that you 'know' something after all.
Nah, worded poorly and probably oxymoronic.
Like most 'bumperstickers', it fails under critical scrutiny. Sounds all wise and stuff, if left unexamined, though, and that is enough for most...