Keelefilosoofia raamat
a numerically different person.)
60 Reference and referring
I said that Twin Earth is a nearly exact duplicate of Earth. There is one dif-
ference: what looks and behaves like water on Twin Earth is not water--that
is, H 2O--but a different substance that Putnam calls XYZ. XYZ is odorless
and tasteless and has the other superficial properties that water does, but
it is only "fool's water" (as in "fool's gold"). Of course, the Twin-English-
speaking Twin Earthlings call the XYZ "water," since they are otherwise
just like us,13 but that is an equivocation; "water" in Twin English means
XYZ, not water, just as (I am told) the kind term "chicory" in British English
means a different plant from the one meant by the same word in American
English.
Now, consider a pair of transworld twins, say Gordon Brown and Twin
Gordon. After a natural disaster, Brown emphasizes the urgency of getting
food and water to the victims