>Now the radical skepticism that ravi is practicing is sufficient to deny
>_any_ claim to knowledge, scientific, pre-scientific, what have you. And
>the best answer usually to radical skepticism is not Dr. Johnson's stone
>but merely changing the subject. It is not worth arguing because nothing
>follows from it.
>
>
>
Wittgenstein, /On certainty/ is good on the pointlessness of these "egg
& sperm" or "My hands exist" arguments.
Miles