 Some might find these science fiction stories extravagant, and it may be unclear whether they teach us anything about the real world. Yet there are actual examples which also illustrate the point (Ludlow 1995b; see also Butler 1997, Tye  1998).[10]  Consider that ‘chicory’ and ‘endive’ have their denotations switched between Standard American English and British English. The two types of salad green also seem identical to the untrained eye (or palate, as the case may be). Thus a Brit and an American, both untrained, might be internally the same in all relevant respects, yet refer to different greens when asserting “chicory is scrumptious.” So ‘chicory’ will express a concept with different content, despite the subjects being internally alike. (Notably, ‘water’ itself might vary in content among different locations in the actual world. What flows from taps contains different admixtures in different municipalities. Cf. Malt 1994.)