Although the twin earth thought experiment illustrated natural types aren't these entities, its original formulator claimed water and proper names are examples of them.
A non-materialist physical position of consciousness put forth by Grover Maxwell claims that physical states function as these in relation to mental states. Introduced in a discussion about "C-Fiber stimulation," they are divided into two classes, strong or not strong, depending on whether it is possible to tell the function of the object associated with them. They were proposed to suggest that theoretical identity statements that are true are necessarily true and to attack Gottlob Frege and Bertrand Russell's descriptivist theories. Their usefulness lies in their formulator's problem of "transworld identification." Although the twin earth thought experiment illustrated natural types aren't these entities, its original formulator claimed water and proper names are examples of them. For 10 points, identify these concepts of reference that were discussed in Naming and Necessity by Saul Kripke.
A non-materialist physical position of consciousness put forth by Grover Maxwell claims that physical states function as these in relation to mental states.
Rigid designators