We can ask Chris and Larry (I can if/when I see them).
My take on the way this argument got resolved is that Chris and Larry/Jamie agree on the math—namely that to “solve” the example using B methods we need to have a prior that depends on pi. The possible source of disagreement is interpretational.
Larry and Jamie think that this is Bayesians doing “frequentist pursuit”, that is using B machinery to mimic a fundamentally F behavior. As they say, there is nothing wrong with this, but the B here seems extraneous. Chris probably doesn’t see it that way, he probably thinks this is the natural way to do this problem in a B way.
The weird thing about (what I think) Chris’ position here is that this example violates the “likelihood principle” some Bayesians like. The likelihood principle states that all information lives in the likelihood. Of course here the example is set up in such a way that the assignment probably pi(X) is (a) not a part of the likelihood and (b) is highly informative. The natural way for a Bayesian to deal with this is to stick pi(X) in the prior. This is formally ok, but kind of weird and unnatural.
How weird and unnatural it is is a matter of interpretation, I suppose.
This example is very simple, there are much more complicated versions of this. For example, what if we don’t know pi(X), but have to model it? Does pi(X) still go into the prior? That way lie dragons...
I guess my point is, these types of highly technical discussions are the discussions that professionals have if B vs F comes up. If this is too technical, may I ask why even get into this? Maybe this level of technicality is the natural point of technicality for this argument in this, the year of our Lord 2017? This is kind of my point, if you aren’t a professional, why are you even talking about this?
It’s a good question about a history text on B vs F. Let me ask around.
edit: re: dragons, I guess what I mean is, it seems most things in life can be phrased in F or B ways. But there are a lot of phenomena for which the B phrasing, though it exists, isn’t really very clarifying. These might include identification and model misspecification issues. In such cases the B phrasing just feels like carrying around ideological baggage.
My philosophy is inherently multiparadigm—you use the style of kung fu that yields the most benefit or the most clarity for the problem. Sometimes that’s B and sometimes that’s F and sometimes that’s something else. I guess in your language that would be “instrumental rationality in data analysis.”
We can ask Chris and Larry (I can if/when I see them).
My take on the way this argument got resolved is that Chris and Larry/Jamie agree on the math—namely that to “solve” the example using B methods we need to have a prior that depends on pi. The possible source of disagreement is interpretational.
Larry and Jamie think that this is Bayesians doing “frequentist pursuit”, that is using B machinery to mimic a fundamentally F behavior. As they say, there is nothing wrong with this, but the B here seems extraneous. Chris probably doesn’t see it that way, he probably thinks this is the natural way to do this problem in a B way.
The weird thing about (what I think) Chris’ position here is that this example violates the “likelihood principle” some Bayesians like. The likelihood principle states that all information lives in the likelihood. Of course here the example is set up in such a way that the assignment probably pi(X) is (a) not a part of the likelihood and (b) is highly informative. The natural way for a Bayesian to deal with this is to stick pi(X) in the prior. This is formally ok, but kind of weird and unnatural.
How weird and unnatural it is is a matter of interpretation, I suppose.
This example is very simple, there are much more complicated versions of this. For example, what if we don’t know pi(X), but have to model it? Does pi(X) still go into the prior? That way lie dragons...
I guess my point is, these types of highly technical discussions are the discussions that professionals have if B vs F comes up. If this is too technical, may I ask why even get into this? Maybe this level of technicality is the natural point of technicality for this argument in this, the year of our Lord 2017? This is kind of my point, if you aren’t a professional, why are you even talking about this?
It’s a good question about a history text on B vs F. Let me ask around.
edit: re: dragons, I guess what I mean is, it seems most things in life can be phrased in F or B ways. But there are a lot of phenomena for which the B phrasing, though it exists, isn’t really very clarifying. These might include identification and model misspecification issues. In such cases the B phrasing just feels like carrying around ideological baggage.
My philosophy is inherently multiparadigm—you use the style of kung fu that yields the most benefit or the most clarity for the problem. Sometimes that’s B and sometimes that’s F and sometimes that’s something else. I guess in your language that would be “instrumental rationality in data analysis.”