But does temperature equate to (the sensation of) heat? — Banno
So, in this sense, the expression 'the inventor of bifocals' is nonrigid: under certain circumstances one man would have been the inventor of bifocals; under other circumstances, another one would have — pdf, page 10
What do I mean by 'rigid designator'? I mean a term that designates the same object in all possible worlds — pdf, page 11
!!!...in talking about the notion of a rigid designator, I do not mean to imply that the object referred to has to exist in all possible worlds, that is, that it has to necessarily exist.
Well, I think it is. That is, I'm now reading Kripke as suggesting that heat and the sensation of heat are somehow different things. Not too sure about that. — Banno
That is, what is it that the sentence quoted above is about? It seems that it is about Hesperus. If one asks what it is that you are suggesting we remove the properties from, the answer is "Hesperus", and this is so even if the properties are removed. That is, in Kripke's terms "Hesperus" is a rigid designator, while it's various properties may not be. — Banno
If all the properties of Hesperus disappeared from existence, Hesperus would no longer exist. — RussellA
Therefore, "Heat is the motion of molecules" will be necessary, not contingent, and one only has the illusion of contingency in the way one could have the illusion of contingency in thinking that this table might have been made of ice. We might think one could imagine it, but if we try, we can see on reflection that what we are really imagining is just there being another lectern in this very position here which was in fact made of ice. The fact that we may identify this lectern by being the object we see and touch in such and such a position is something else. — p.188
In the case of the demonstrative, "This lectern might not have been wood" can be understood in two ways. On the one account, this wooden lectern might have ben replaced by some other lectern, which was not made of wood. On the other account, this very wooden lectern might not be made of wood, and an inconsistency occurs, since we would have a wooden lectern that was not made of wood. — Banno
So the first is the better option. The demonstrative rigidly designates the lectern. — Banno
Kripke's proposition that "identity statements are necessary" is true
1) Objects are observed in the sky. By observation, as "Phosphorus" has a diameter of 12,103km, and as "Hesperus" has a diameter of 12,103km, "Phosphorus" is identical in diameter to "Hesperus". Therefore, the identity statement "Phosphorus is identical in diameter to Hesperus" is true. — RussellA
I don't debate MU, and I don't debate you, for pretty much the same reason. — frank
What do you make of this, pg 177-8: — Mww
And in your example, we need a similar a priori principle which states that one measurement of 12,103km is necessarily the same as another measurement of 12,103km. — Metaphysician Undercover
...but it wouldn't make sense if it were otherwise... — Banno
I know The Red Sox will win their next game, I know The Eiffel Tower is in Paris and I know that I am looking at the colour red. The word "know" is being metaphorically, in that it has degrees of certainty, because language is inherently metaphorical
Similarly, the word "same" is being used metaphorically having varying degrees of certainty. — RussellA
So in some possible world, Hesperus has no properties, and hence Hesperus does not exist in that world. It doesn't follow that Hesperus does not exist in some other possible world. — Banno
We can reduce ambiguity and increase certainty by employing axioms which leave no room for ambiguity. — Metaphysician Undercover
And, Kripke supposes, this goes for any equivalence between heat and the motion of molecules. If "heat" is a rigid designator for that sensation, and "the motion of molecules" is a rigid designator for molecules in motion, then if heat is the motion of molecules, it is necessarily so. — Banno
I proposed that if in this actual world, all the properties of Hesperus disappeared, then Hesperus would also disappear. — RussellA
I would say, that your example shows the existence of ambiguity rather than metaphor — Metaphysician Undercover
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