Consider the case of the fossil sleuth O. C. Marsh. He discovered traces of a hitherto unknown dinosaur, which he mistook for an adult specimen, and named it Apatosaurus . Later he found another, larger, fossil of a dinosaur that he dubbed Brontosaurus , and which he mistakenly believed to belong to a different species. The latter name caught on, which has unsettled purists because professional rules dictate that the original name for a species be the official one. However, some museums continue to use the label Brontosaurus , and that is the title by which generations of children recognize these ungainly creatures.
Similar instances abound in botany, where there are both popular and scientific names for plants.
Fred does not believe that the dog dug up the Pyrethrum bed. If these are different names of natural kinds, they are names of the same kind. Both are atomic or neither is. Consequently, it is arguable that Daphne s belief that Fred is a bachelor could be a different belief from Daphne s belief that Fred is an unmarried man. But all bets are off if our principles for individuating Daphne s beliefs depend on the character of their tokening in LOT rather than in a natural language such as English.