A good example is Eco’s use of the notion of ‘rigid designation’. This is a technical term due to Saul Kripke, for a feature belonging to names and indexical expressions (‘this’ ‘I’, ‘here’) in natural languages, and distinguishing them from other referring expressions, notably descriptions (‘the first dog born at sea’, ‘Kant’s home town’). In a nutshell, the ‘rigidity’ in question means that when you use a name, even to talk about strange and different possibilities, you are still interpreted as talking about whatever it is to which the name actually refers. So if I say, ‘Had the political boundaries been slightly different, the people of Königsberg might have spoken Latvian,’ I am still talking about that very town, Königsberg. But if I say, ‘Had his parents moved south, Kant’s home town might have been Berlin,’ the description ‘Kant’s home town’ has become detached, as it were, from Königsberg. For I am not trying to say that had Kant’s parent’s moved south, Königsberg might have been Berlin. I am saying that Berlin is where he might have been born and raised. This is what is meant by saying that descriptions are not rigid, whereas names are.
Eco talks much of rigid designation. Unfortunately he identifies it by the ambiguous formula that a rigid designator refers to the same thing ‘in all possible worlds’, and then takes that formula in the wrong sense, as meaning that there is no possibility of the same name referring to something different. This is actually a misunderstanding against which Kripke explicitly and clearly warned, more than once.
This analysis can also be applied to kinds. Considered extensionally that seems reasonable to me. If "Dog A" refers to a placental mammal, as does "Dog B" and "Dog C" and so on, so that we conclude that all dogs are placental mammal, we also conclude that being a dog involves being a placental mammal. SO something we come across that is dog-like but not a placental mammal, ought not be considered as a dog - the Thylacine being a case in point. The extension of "Dog" includes only placental mammals, in all accessible possible worlds. — Banno
That water is H₂O is an empirical discovery.
If we were to find a substance that looks, feels and otherwise functions like water, but had a chemical structure other than H₂O, it would not be water.
If we stipulated a possible world in which there is a substance that looks, feels and otherwise functions like water, but had a chemical structure other than H₂O, it would not be water.
That is, in every possible world, water is H₂O.
That is, water is necessarily H₂O.
Hence, there are a posteriori necessities. — Banno
There's a bit of a puzzle here for me, looking back. Why would anyone have thought that it was easier to use properties to set up names, rather than names to set up properties? As if it was easier to deal with "orange", "skin", and "narcissist" rather than "Trump". — Banno
Tritium oxide would be genius's water. What is the necessity here? That we talk a certain way?, that we prioritise element over isotope? Are heavy water and superheavy water 'really', 'necessarily' water, or not water? I cannot make out what the necessity is claimed to be. — unenlightened
If we were to find a substance that looks, feels and otherwise functions like water, but had a chemical structure other than H₂O, it would not be water. — Banno
If we stipulated a possible world in which there is a substance that looks, feels and otherwise functions like water, but had a chemical structure other than H₂O, it would not be water. — Banno
Rather, in so far as the referent of a proper name is fixed at all, it is by what Kripke calls causal chains, but what I might call shared use. — Banno
Rather, in so far as the referent of a proper name is fixed at all, it is by what Kripke calls causal chains, but what I might call shared use. — Banno
A. The lectern is made of wood.
B. If the lectern exists, it is made of wood.
Since a person can be deceived, B is the necessary statement known a posteriori, not A. — frank
I can't find anything like this. — Banno
Rather, in so far as the referent of a proper name is fixed at all, it is by what Kripke calls causal chains, but what I might call shared use. — Banno
the initial baptism cannot use the antecedent causal chain to account for why the name has its chosen object as its semantic value. — fdrake
What kind of accounting are we looking for here? The initial baptism could involve definite description or ostention. If something else is needed, is it something descriptivists allow that Kripke doesn't? — frank
Do you mean the author agrees that a speaker need not have a definite description in mind when using a proper name or kind name? — frank
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