I’m sorry if I wasn’t clear about Alice, who is intended to represent a school of thought in philosophy of science called logical positivism.
I think you were advocating a position similar to her position, especially when you were saying that A Simple Truth was a sufficient theory of what truth is. Further, I agree that the adjustment that Alice should make to her theory is to abandon what I’ve called descriptiveness. Thus, I still think you are closer to Alice than to Feyerabend as long as you think scientific theories get “closer to reality” in some meaningful way.
As I understand it, theory incommesurability should be understood as an empirical theory, much the same way that academic historical theories are empirical theories.
Theories change.
I’m pretty sure Alice agrees.
Some theory changes are radical (i.e. involve incommensurability)
I think this is true, as a historical matter. A geocentric theory (epicycles) was replaced by a heliocentric theory. There’s no reasonable way to translate rotating circles on top of other rotating circles embedded in the sky (epicycles) into anything in the Copernican/Keplerian planets-elliptically-orbit-the-Sun theory. I don’t think Alice rejects this either. I expect she explains that Science became non-empirical for a extended period of time, probably based on influence/co-option by non-empirical entities like the Catholic Church. But when Science was restored to its proper function by the return of empiricism, the geocentric nonsense was flushed away. There was no reason to expect that geocentrism would translate into heliocentrism because geocentrism was not sufficiently based on observation. (I’m not sure if this story is historically correct, but that’s Alice’s problem, not mine).
All significant theory changes were radical theory changes. Alice obviously doesn’t agree. If impetus != momentum, this is evidence in support of this proposition. Likewise, if impetus = momentum, this is evidence against the proposition. If the proposition is true, I think you are right when you say:
if one accepts theory incommesurability, then it probably wouldn’t make sense to talk about theories being (probably) closer to reality.
But I don’t think that requires one to reject the concept of reality.
I think you were advocating a position similar to her position, especially when you were saying that A Simple Truth was a sufficient theory of what truth is.
I don’t think that A Simple Truth advocates a theory per se; I see it as more of call to reject complex and convoluted philosophical truth theories, in favor of actually doing science (and engineering).
theory incommesurability should be understood as an empirical theory
As far as I understand from your arguments so far, the notions of empiricism and incommensurability are incommensurable.
There’s no reasonable way to translate rotating circles on top of other rotating circles embedded in the sky (epicycles) into anything in the Copernican/Keplerian planets-elliptically-orbit-the-Sun theory.
No, but you could probably go the other way. Given both theories, you could calculate the minimum magnitude of the experimental error required in order for them to become indistinguishable. If your instruments are less precise than that, then you may as well use epicycles (Occam’s Razor aside).
I expect she explains that Science became non-empirical for a extended period of time, probably based on influence/co-option by non-empirical entities like the Catholic Church.
I don’t think this is accurate, historically speaking. Yes, the influence of the Catholic Church was quite harmful to science, but they didn’t invent geocentrism. In fact, geocentrism is quite empirical. If you’re a sage living in ancient Babylon, you can very easily look up and see the Sun moving around the (flat) Earth. Given the available evidence, you’d be fully justified in concluding that geocentrism is true. You’d be wrong, as we now know, but it’s ok to be wrong sometimes (see what I said earlier about local minima).
All significant theory changes were radical theory changes.
This sounds like a tautology to me.
If impetus != momentum, this is evidence in support of this proposition. Likewise, if impetus = momentum, …
Sorry, I must have missed a sentence: what is the “this” you’re referring to, when you say “this is evidence” ? As for impetus and momentum, they’re quite different concepts, so you can’t equate them. Impetus is a sort of elan vital of motion, whereas Newton’s momentum (if I understand it correctly) is just an explanation of how objects move. Either impetus exists (in the same way that elan vital was thought to exist), or it doesn’t; there aren’t any other options. Today, we believe that impetus does not exist, but there’s still a small chance that it does; if we ever discover any evidence of it, we’ll update our beliefs.
But I don’t think that requires one to reject the concept of reality.
As far as I understand from your arguments, you are rejecting the notion that scientific theories describe reality in any way; and, due to your belief in incommensurability, you believe that the fact that some theories allow us to develop what seems to be an understanding of the world (*), to be somewhat of a mystery. Does this accurately describe your position ? If so, I don’t see what accepting “a concept of reality” would buy you, since reality is (due to incommensurability) unknowable.
I agree with you that, given that incommensurability is true, your position makes sense. But I still don’t see why I should accept that incommensurability is true. From your arguments, it almost sounds like you require scientists to be omniscient: you see any significant mistake in our scientific understanding of the world as an insurmountable barrier to understanding. But I still don’t understand why. All people make mistakes all the time, not just scientists.
At one point, I personally thought that driving from my house to work takes about 30 minutes. But then I found a shortcut through a corporate parking lot, which shaved the time down to about 25 minutes. My two maps of the world were certainly incompatible: one contained the shortcut, the other did not; and the routes were very different. Does this mean that the two maps are incommensurate, and that we must therefore reject the very notion of them describing the actual terrain in any way ? Why can’t we just say, “Bugmaster was wrong because he didn’t have enough data” ?
(*) Seeing as I’m typing these words using a device powered by our understanding of quantum mechanics, etc.
I’m sorry if I wasn’t clear about Alice, who is intended to represent a school of thought in philosophy of science called logical positivism.
I think you were advocating a position similar to her position, especially when you were saying that A Simple Truth was a sufficient theory of what truth is. Further, I agree that the adjustment that Alice should make to her theory is to abandon what I’ve called descriptiveness. Thus, I still think you are closer to Alice than to Feyerabend as long as you think scientific theories get “closer to reality” in some meaningful way.
As I understand it, theory incommesurability should be understood as an empirical theory, much the same way that academic historical theories are empirical theories.
Theories change.
I’m pretty sure Alice agrees.
Some theory changes are radical (i.e. involve incommensurability)
I think this is true, as a historical matter. A geocentric theory (epicycles) was replaced by a heliocentric theory. There’s no reasonable way to translate rotating circles on top of other rotating circles embedded in the sky (epicycles) into anything in the Copernican/Keplerian planets-elliptically-orbit-the-Sun theory.
I don’t think Alice rejects this either. I expect she explains that Science became non-empirical for a extended period of time, probably based on influence/co-option by non-empirical entities like the Catholic Church. But when Science was restored to its proper function by the return of empiricism, the geocentric nonsense was flushed away. There was no reason to expect that geocentrism would translate into heliocentrism because geocentrism was not sufficiently based on observation. (I’m not sure if this story is historically correct, but that’s Alice’s problem, not mine).
All significant theory changes were radical theory changes.
Alice obviously doesn’t agree. If impetus != momentum, this is evidence in support of this proposition. Likewise, if impetus = momentum, this is evidence against the proposition. If the proposition is true, I think you are right when you say:
But I don’t think that requires one to reject the concept of reality.
I don’t think that A Simple Truth advocates a theory per se; I see it as more of call to reject complex and convoluted philosophical truth theories, in favor of actually doing science (and engineering).
As far as I understand from your arguments so far, the notions of empiricism and incommensurability are incommensurable.
No, but you could probably go the other way. Given both theories, you could calculate the minimum magnitude of the experimental error required in order for them to become indistinguishable. If your instruments are less precise than that, then you may as well use epicycles (Occam’s Razor aside).
I don’t think this is accurate, historically speaking. Yes, the influence of the Catholic Church was quite harmful to science, but they didn’t invent geocentrism. In fact, geocentrism is quite empirical. If you’re a sage living in ancient Babylon, you can very easily look up and see the Sun moving around the (flat) Earth. Given the available evidence, you’d be fully justified in concluding that geocentrism is true. You’d be wrong, as we now know, but it’s ok to be wrong sometimes (see what I said earlier about local minima).
This sounds like a tautology to me.
Sorry, I must have missed a sentence: what is the “this” you’re referring to, when you say “this is evidence” ? As for impetus and momentum, they’re quite different concepts, so you can’t equate them. Impetus is a sort of elan vital of motion, whereas Newton’s momentum (if I understand it correctly) is just an explanation of how objects move. Either impetus exists (in the same way that elan vital was thought to exist), or it doesn’t; there aren’t any other options. Today, we believe that impetus does not exist, but there’s still a small chance that it does; if we ever discover any evidence of it, we’ll update our beliefs.
As far as I understand from your arguments, you are rejecting the notion that scientific theories describe reality in any way; and, due to your belief in incommensurability, you believe that the fact that some theories allow us to develop what seems to be an understanding of the world (*), to be somewhat of a mystery. Does this accurately describe your position ? If so, I don’t see what accepting “a concept of reality” would buy you, since reality is (due to incommensurability) unknowable.
I agree with you that, given that incommensurability is true, your position makes sense. But I still don’t see why I should accept that incommensurability is true. From your arguments, it almost sounds like you require scientists to be omniscient: you see any significant mistake in our scientific understanding of the world as an insurmountable barrier to understanding. But I still don’t understand why. All people make mistakes all the time, not just scientists.
At one point, I personally thought that driving from my house to work takes about 30 minutes. But then I found a shortcut through a corporate parking lot, which shaved the time down to about 25 minutes. My two maps of the world were certainly incompatible: one contained the shortcut, the other did not; and the routes were very different. Does this mean that the two maps are incommensurate, and that we must therefore reject the very notion of them describing the actual terrain in any way ? Why can’t we just say, “Bugmaster was wrong because he didn’t have enough data” ?
(*) Seeing as I’m typing these words using a device powered by our understanding of quantum mechanics, etc.