Reminds me of Decarte who knew that he existed because he knew that he was thinking. He didn't know anything else for sure though b/c he apparently thought it was possible to just think w/o actually thinking about something.
Yes, exactly. This the real meaning of the joke I've already posted elsewhere of Descarte before dehorse. I've been all through the demon box and it has more errors based upon the implications of the scenario than I can count. I've also seen it put, preface of Skeptical Inquirer Magazine if I remember corrrectly, that he got it backwards, "I am, therefore I think."