On "The Meaning of Meaning" (1975). So if per Kripke (we're following the thread from #126), meaning is NOT a matter of having a description in your head, then what is it? Hilary Putnam reformulates Kripke's insight in terms of Twin Earths: If Earth-water is H2O, and on Twin Earth, they have something that looks just like water but is a different compound, then we wouldn't  Continue Reading …