"371. What would a society all of deaf men be like? Or a society of the 'feeble-minded' ? An important question! What then of a society that never played many of our customary language-games?"
"373. Concepts other than though akin to ours might seem very queer to us; deviation from the usual in an unusual direction."
"374. Concepts with fixed limits would demand a uniformity of behavior. But where I am certain, someone else is uncertain. And that is a fact of nature."
"375. There are the fixed rails along which all our thinking runs, and so our judgment and action goes according to them too."
Wittgenstein, Zettel, edited by G. E. M. Anscombe and
G. H. von Wright, translated by G. E. M. Anscombe,
University of California Press, 2007